Colorado's 4th Congressional District

Colorado's 4th Congressional District

Incumbent

Lauren Boebert

Assumed office: January 3, 2025

Colorado's 4th Congressional District in the United States House of Representatives is represented by Lauren Boebert (R).

As of the 2020 Census, Colorado representatives represented an average of 722,771 residents. After the 2010 Census, each member represented 720,704 residents.

Elections

• 2030
• 2028
• 2026
• 2024
• 2022
• 2020
• 2018

See also: Colorado's 4th Congressional District election, 2030

There are no official candidates yet for this election.

See also: United States House of Representatives elections in Colorado, 2028

There are no official candidates yet for this election.

See also: Colorado's 4th Congressional District election, 2026

General election

The primary will occur on June 30, 2026. The general election will occur on November 3, 2026. General election candidates will be added here following the primary.

General election for U.S. House Colorado District 4

Douglas Mangeris (L) and Wayne Thornton (Unaffiliated) are running in the general election for U.S. House Colorado District 4 on November 3, 2026.

		Candidate
	Submit photo	Douglas Mangeris (L)
	Submit photo	Wayne Thornton (Unaffiliated)

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	There are no incumbents in this race.
= candidate completed the Ballotpedia Candidate Connection survey.
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Democratic primary

Democratic primary for U.S. House Colorado District 4

Trisha Calvarese (D), Eileen Laubacher (D), John Padora Jr. (D), and Jenna Preston (D) are running in the Democratic primary for U.S. House Colorado District 4 on June 30, 2026.

		Candidate
		Trisha Calvarese
		Eileen Laubacher
		John Padora Jr.
		Jenna Preston

---

	There are no incumbents in this race.
= candidate completed the Ballotpedia Candidate Connection survey.
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Withdrawn or disqualified candidates

• Kurt Maddox (D)

Republican primary

Republican primary for U.S. House Colorado District 4

Incumbent Lauren Boebert (R) and Eric San Felipe (R) are running in the Republican primary for U.S. House Colorado District 4 on June 30, 2026.

		Candidate
		Lauren Boebert
	Submit photo	Eric San Felipe

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	Incumbents are bolded and underlined.
= candidate completed the Ballotpedia Candidate Connection survey.
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Special election

See also: Colorado's 4th Congressional District special election, 2024

General election

Special general election for U.S. House Colorado District 4

Greg Lopez (R) defeated Trisha Calvarese (D), Hannah Goodman (L), and Frank Atwood (Approval Voting Party) in the special general election for U.S. House Colorado District 4 on June 25, 2024.

		Candidate	%	Votes
✔		Greg Lopez (R)	58.4	100,095
		Trisha Calvarese (D)	34.4	59,013
		Hannah Goodman (L)	5.3	9,069
		Frank Atwood (Approval Voting Party)	1.9	3,225

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	There were no incumbents in this race. The results have been certified. Source	Total votes: 171,402
= candidate completed the Ballotpedia Candidate Connection survey.
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Withdrawn or disqualified candidates

• Mark Elworth Jr. (Unaffiliated)

Regular election

See also: Colorado's 4th Congressional District election, 2024

General election

General election for U.S. House Colorado District 4

Incumbent Lauren Boebert (R) defeated Trisha Calvarese (D), Hannah Goodman (L), Frank Atwood (Approval Voting Party), and Paul Fiorino (Unity Party) in the general election for U.S. House Colorado District 4 on November 5, 2024.

		Candidate	%	Votes
✔		Lauren Boebert (R)	53.6	240,213
		Trisha Calvarese (D)	42.0	188,249
		Hannah Goodman (L)	2.6	11,676
		Frank Atwood (Approval Voting Party)	1.4	6,233
		Paul Fiorino (Unity Party)	0.3	1,436

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	Incumbents are bolded and underlined. The results have been certified. Source	Total votes: 447,807
= candidate completed the Ballotpedia Candidate Connection survey.
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Withdrawn or disqualified candidates

• Douglas Mangeris (L)

Democratic primary

Democratic primary for U.S. House Colorado District 4

Trisha Calvarese (D) defeated Ike McCorkle (D) and John Padora Jr. (D) in the Democratic primary for U.S. House Colorado District 4 on June 25, 2024.

		Candidate	%	Votes
✔		Trisha Calvarese	45.2	22,756
		Ike McCorkle	41.1	20,723
		John Padora Jr.	13.7	6,882

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	There were no incumbents in this race. The results have been certified. Source	Total votes: 50,361
= candidate completed the Ballotpedia Candidate Connection survey.
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Withdrawn or disqualified candidates

• Karen Breslin (D)
• Anil Saxena (D)

Republican primary

Republican primary for U.S. House Colorado District 4

The following candidates ran in the Republican primary for U.S. House Colorado District 4 on June 25, 2024.

		Candidate	%	Votes
✔		Lauren Boebert	43.7	54,605
		Jerry Sonnenberg	14.2	17,791
		Deborah Flora	13.6	17,069
		Richard Holtorf	10.7	13,387
		Michael Lynch	10.7	13,357
		Peter Yu	7.1	8,854

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	Incumbents are bolded and underlined. The results have been certified. Source	Total votes: 125,063
= candidate completed the Ballotpedia Candidate Connection survey.
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Withdrawn or disqualified candidates

• Ken Buck (R)
• Mariel Bailey (R)
• Ted Harvey (R)
• Trent Leisy (R)
• Chris Phelen (R)
• Justin Schreiber (R)
• Floyd Trujillo (R)

See also: Colorado's 4th Congressional District election, 2022

General election

General election for U.S. House Colorado District 4

Incumbent Ken Buck (R) defeated Ike McCorkle (D) and Ryan McGonigal (American Constitution Party) in the general election for U.S. House Colorado District 4 on November 8, 2022.

		Candidate	%	Votes
✔		Ken Buck (R)	60.9	216,024
		Ike McCorkle (D)	36.6	129,619
	Submit photo	Ryan McGonigal (American Constitution Party)	2.5	8,870

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	Incumbents are bolded and underlined. The results have been certified. Source	Total votes: 354,513
= candidate completed the Ballotpedia Candidate Connection survey.
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Withdrawn or disqualified candidates

• Frank Jensik (L)
• Donna Windholz (Independent)

Democratic primary

Democratic primary for U.S. House Colorado District 4

Ike McCorkle (D) advanced from the Democratic primary for U.S. House Colorado District 4 on June 28, 2022.

		Candidate	%	Votes
✔		Ike McCorkle	100.0	42,244

---

	There were no incumbents in this race. The results have been certified. Source	Total votes: 42,244
= candidate completed the Ballotpedia Candidate Connection survey.
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Withdrawn or disqualified candidates

• Rome Vibe (D)

Republican primary

Republican primary for U.S. House Colorado District 4

Incumbent Ken Buck (R) defeated Robert Lewis (R) in the Republican primary for U.S. House Colorado District 4 on June 28, 2022.

		Candidate	%	Votes
✔		Ken Buck	74.0	90,091
	Submit photo	Robert Lewis	26.0	31,593

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	Incumbents are bolded and underlined. The results have been certified. Source	Total votes: 121,684
= candidate completed the Ballotpedia Candidate Connection survey.
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Libertarian Party primary

The Libertarian Party primary scheduled for June 28, 2022, was canceled.

Withdrawn or disqualified candidates

• Joshua Rodriguez (L)

Libertarian Party convention

Libertarian convention for U.S. House Colorado District 4

Frank Jensik (L) advanced from the Libertarian Party convention for U.S. House Colorado District 4 on March 12, 2022.

		Candidate
✔	Submit photo	Frank Jensik

---

	There were no incumbents in this race. The results have been certified. Source
= candidate completed the Ballotpedia Candidate Connection survey.
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See also: Colorado's 4th Congressional District election, 2020

General election

General election for U.S. House Colorado District 4

Incumbent Ken Buck (R) defeated Ike McCorkle (D), Bruce Griffith (L), and Laura Ireland (Unity Party) in the general election for U.S. House Colorado District 4 on November 3, 2020.

		Candidate	%	Votes
✔		Ken Buck (R)	60.1	285,606
		Ike McCorkle (D)	36.6	173,945
		Bruce Griffith (L)	2.3	11,026
	Submit photo	Laura Ireland (Unity Party)	1.0	4,530

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	Incumbents are bolded and underlined. The results have been certified. Source	Total votes: 475,107
= candidate completed the Ballotpedia Candidate Connection survey.
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Democratic primary

Democratic primary for U.S. House Colorado District 4

Ike McCorkle (D) advanced from the Democratic primary for U.S. House Colorado District 4 on June 30, 2020.

		Candidate	%	Votes
✔		Ike McCorkle	100.0	81,719

---

	There were no incumbents in this race. The results have been certified. Source	Total votes: 81,719
= candidate completed the Ballotpedia Candidate Connection survey.
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Withdrawn or disqualified candidates

• James McGannon (D)
• Melanie Diane Tomitsch (D)

Republican primary

Republican primary for U.S. House Colorado District 4

Incumbent Ken Buck (R) advanced from the Republican primary for U.S. House Colorado District 4 on June 30, 2020.

		Candidate	%	Votes
✔		Ken Buck	100.0	109,230

---

	Incumbents are bolded and underlined. The results have been certified. Source	Total votes: 109,230
= candidate completed the Ballotpedia Candidate Connection survey.
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Libertarian Party convention

Libertarian convention for U.S. House Colorado District 4

Bruce Griffith (L) advanced from the Libertarian Party convention for U.S. House Colorado District 4 on April 13, 2020.

		Candidate
✔		Bruce Griffith

---

	There were no incumbents in this race. The results have been certified.
= candidate completed the Ballotpedia Candidate Connection survey.
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Unity Party convention

Unity convention for U.S. House Colorado District 4

Laura Ireland (Unity Party) advanced from the Unity Party convention for U.S. House Colorado District 4 on April 4, 2020.

		Candidate
✔	Submit photo	Laura Ireland

---

	There were no incumbents in this race. The results have been certified.
= candidate completed the Ballotpedia Candidate Connection survey.
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See also: United States House of Representatives elections in Colorado, 2018

General election

General election for U.S. House Colorado District 4

Incumbent Ken Buck (R) defeated Karen McCormick (D) in the general election for U.S. House Colorado District 4 on November 6, 2018.

		Candidate	%	Votes
✔		Ken Buck (R)	60.6	224,038
		Karen McCormick (D)	39.4	145,544
		Other/Write-in votes	0.0%	39

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	Incumbents are bolded and underlined. The results have been certified. Source	Total votes: 369,621 (100% precincts reporting)
= candidate completed the Ballotpedia Candidate Connection survey.
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Democratic primary

Democratic primary for U.S. House Colorado District 4

Karen McCormick (D) defeated Chase Kohne (D) in the Democratic primary for U.S. House Colorado District 4 on June 26, 2018.

		Candidate	%	Votes
✔		Karen McCormick	64.7	37,120
		Chase Kohne	35.3	20,269

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	There were no incumbents in this race. The results have been certified.	Total votes: 57,389
= candidate completed the Ballotpedia Candidate Connection survey.
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Withdrawn or disqualified candidates

• Larry Germanson (D)
• Leonard Sistek (D)

Republican primary

Republican primary for U.S. House Colorado District 4

Incumbent Ken Buck (R) advanced from the Republican primary for U.S. House Colorado District 4 on June 26, 2018.

		Candidate	%	Votes
✔		Ken Buck	100.0	85,290

---

	Incumbents are bolded and underlined. The results have been certified.	Total votes: 85,290
= candidate completed the Ballotpedia Candidate Connection survey.
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Withdrawn or disqualified candidates

• Jim Gunning (R)

Previous election results

2016

See also: Colorado's 4th Congressional District election, 2016

Heading into the election, Ballotpedia rated this race as safely Republican. Incumbent Ken Buck (R) defeated Bob Seay (D), Bruce Griffith (L), and Donald Howbert (R write-in) in the general election on November 8, 2016. No candidate faced a primary opponent in June.

U.S. House, Colorado District 4 General Election, 2016

Party		Candidate	Vote %	Votes
	Republican	Ken Buck Incumbent	63.5%	248,230
	Democratic	Bob Seay	31.7%	123,642
	Libertarian	Bruce Griffith	4.8%	18,761
Total Votes				390,633
Source: Colorado Secretary of State

2014

See also: Colorado's 4th Congressional District elections, 2014

The 4th Congressional District of Colorado held an election for the U.S. House of Representatives on November 4, 2014. Incumbent Cory Gardner (R) did not seek re-election in 2014. He instead ran for election to the U.S. Senate. Ken Buck (R) defeated Vic Meyers (D), Jess Loban (L) and Grant Doherty (I) in the general election.

U.S. House, Colorado District 4 General Election, 2014

Party		Candidate	Vote %	Votes
	Republican	Ken Buck	64.7%	185,292
	Democratic	Vic Meyers	29.2%	83,727
	Libertarian	Jess Loban	3.3%	9,472
	Independent	Grant Doherty	2.8%	8,016
Total Votes				286,507
Source: Colorado Secretary of State

2012

See also: Colorado's 4th Congressional District elections, 2012

The 4th Congressional District of Colorado held an election for the U.S. House of Representatives on November 6, 2012. Incumbent Cory Gardner won re-election in the district.

U.S. House, Colorado District 4 General Election, 2012

Party		Candidate	Vote %	Votes
	Democratic	Brandon Shaffer	36.8%	125,715
	Republican	Cory Gardner Incumbent	58.4%	199,842
	Libertarian	Josh Gilliland	3.1%	10,674
	Constitution	Doug Aden	1.7%	5,845
Total Votes				342,076
Source: Colorado Secretary of State "Official Election Results, 2012 General Election"

2010
On November 2, 2010, Cory Gardner won election to the United States House. He defeated incumbent Betsy Markey (D), Doug Aden (American Constitution) and Ken Waszkiewicz (Unaffiliated) in the general election.

U.S. House, Colorado District 4 General Election, 2010
Party		Candidate	Vote %	Votes
	Republican	Cory Gardner	52.5%	138,634
	Democratic	Betsy Markey incumbent	41.4%	109,249
	American Constitution	Doug Aden	4.7%	12,312
	Unaffiliated	Ken Waszkiewicz	1.5%	3,986
Total Votes				264,181

2008
On November 4, 2008, Betsy Markey won election to the United States House. She defeated incumbent Marilyn Musgrave (R) in the general election.

U.S. House, Colorado District 4 General Election, 2008
Party		Candidate	Vote %	Votes
	Democratic	Betsy Markey	56.2%	187,347
	Republican	Marilyn Musgrave incumbent	43.8%	146,028
Total Votes				333,375

2006
On November 7, 2006, Marilyn Musgrave won re-election to the United States House. She defeated Angie Paccione (D) and Eric Eidsness (Reform) in the general election.

U.S. House, Colorado District 4 General Election, 2006
Party		Candidate	Vote %	Votes
	Republican	Marilyn Musgrave incumbent	45.6%	109,732
	Democratic	Angie Paccione	43.1%	103,748
	Reform	Eric Eidsness	11.3%	27,133
Total Votes				240,613

2004
On November 2, 2004, Marilyn Musgrave won re-election to the United States House. She defeated Stan Matsunaka (D) and Bob Kinsey (G) in the general election.

U.S. House, Colorado District 4 General Election, 2004
Party		Candidate	Vote %	Votes
	Republican	Marilyn Musgrave incumbent	51%	155,958
	Democratic	Stan Matsunaka	44.8%	136,812
	Green	Bob Kinsey	4.2%	12,739
Total Votes				305,509

2002
On November 5, 2002, Marilyn Musgrave won election to the United States House. She defeated Stan Matsunaka (D) and John Volz (L) in the general election.

U.S. House, Colorado District 4 General Election, 2002
Party		Candidate	Vote %	Votes
	Republican	Marilyn Musgrave	54.9%	115,359
	Democratic	Stan Matsunaka	41.7%	87,499
	Libertarian	John Volz	3.4%	7,097
Total Votes				209,955

2000
On November 7, 2000, Bob Schaffer won re-election to the United States House. He defeated Dan Sewell Ward (Natural Law), Kordon Baker (L) and Leslie Hanks (American Constitution) in the general election.

U.S. House, Colorado District 4 General Election, 2000
Party		Candidate	Vote %	Votes
	Republican	Bob Schaffer incumbent	79.5%	209,078
	Natural Law	Dan Sewell Ward	7.5%	19,721
	Libertarian	Kordon Baker	7.5%	19,713
	American Constitution	Leslie Hanks	3.8%	9,955
	N/A	Write-in	1.7%	4,539
Total Votes				263,006

1998
On November 3, 1998, Bob Schaffer won re-election to the United States House. He defeated Susan Kirkpatrick (D) in the general election.

U.S. House, Colorado District 4 General Election, 1998
Party		Candidate	Vote %	Votes
	Republican	Bob Schaffer incumbent	59.3%	131,318
	Democratic	Susan Kirkpatrick	40.7%	89,973
Total Votes				221,291

1996
On November 5, 1996, Bob Schaffer won election to the United States House. He defeated Guy Kelley (D), Wes McKinley (Americans) and Cynthia Parker (Natural Law) in the general election.

U.S. House, Colorado District 4 General Election, 1996
Party		Candidate	Vote %	Votes
	Republican	Bob Schaffer	56.1%	137,012
	Democratic	Guy Kelley	38%	92,837
	Americans	Wes McKinley	3%	7,428
	Natural Law	Cynthia Parker	2.8%	6,790
Total Votes				244,067

1994
On November 8, 1994, Wayne Allard won re-election to the United States House. He defeated Cathy Kipp (D) in the general election.

U.S. House, Colorado District 4 General Election, 1994
Party		Candidate	Vote %	Votes
	Republican	Wayne Allard incumbent	72.3%	136,251
	Democratic	Cathy Kipp	27.7%	52,202
Total Votes				188,453

1992
On November 3, 1992, Wayne Allard won re-election to the United States House. He defeated Tom Redder (D) in the general election.

U.S. House, Colorado District 4 General Election, 1992
Party		Candidate	Vote %	Votes
	Republican	Wayne Allard incumbent	57.8%	139,884
	Democratic	Tom Redder	42.2%	101,957
Total Votes				241,841

1990
On November 6, 1990, Wayne Allard won election to the United States House. He defeated Richard Bond (D) in the general election.

U.S. House, Colorado District 4 General Election, 1990
Party		Candidate	Vote %	Votes
	Republican	Wayne Allard	54.1%	89,285
	Democratic	Richard Bond	45.9%	75,901
Total Votes				165,186

District map

Redistricting

2020-2021

See also: Redistricting in Colorado after the 2020 census

On November 1, 2021, the Colorado Supreme Court approved the congressional redistricting plan that the state's Independent Congressional Redistricting Commission approved on September 28, 2021. Colorado was apportioned eight seats in the U.S. House of Representatives after the 2020 census, a net gain of one seat as compared to apportionment after the 2010 census. This map took effect for Colorado’s 2022 congressional elections.

The Denver Post's Alex Burness said that the approved map "gives comfortable advantages to each of Colorado’s seven incumbent members of Congress" and that the newly created 8th District would be competitive based on recent results.

How does redistricting in Colorado work? On November 6, 2018, Colorado voters approved two constitutional amendments, Amendment Y and Amendment Z, establishing separate non-politician commissions for congressional and state legislative redistricting. Each commission consists of four members belonging to the state's largest political party, four members belonging to the state's second-largest party, and four members belonging to no party. Commission members are appointed by a panel of three judges selected by the Chief Justice of the Colorado Supreme Court. The amendment requires at least eight of the commission's 12 members, including at least two members not belonging to any political party, to approve a map.

The Colorado Constitution requires that state legislative district boundaries "be contiguous, and that they be as compact as possible based on their total perimeter." In addition, "to the extent possible, districts must also preserve the integrity of counties, cities, towns and–where doing so does not conflict with other goals–communities of interest." There are no similar requirements for congressional districts.

2020

2024

2010-2011

This is the 4th Congressional District of Colorado after the 2001 redistricting process.

See also: Redistricting in Colorado after the 2010 census

In 2011, the Colorado State Legislature re-drew the congressional districts based on updated population information from the 2010 census.

District analysis

See also: The Cook Political Report's Partisan Voter Index

See also: FiveThirtyEight's elasticity scores

2026

Heading into the 2026 elections, based on results from the 2024 and 2020 presidential elections, the Cook Partisan Voter Index for this district is R+9. This meant that in those two presidential elections, this district's results were 9 percentage points more Republican than the national average. This made Colorado's 4th the 141st most Republican district nationally.

2024

Heading into the 2024 elections, based on results from the 2020 and 2016 presidential elections, the Cook Partisan Voter Index for this district was R+13. This meant that in those two presidential elections, this district's results were 13 percentage points more Republican than the national average. This made Colorado's 4th the 111th most Republican district nationally.

Daily Kos calculated what the results of the 2020 presidential election in this district would have been following redistricting. Donald Trump (R) would have defeated Joe Biden (D) 58.0%-39.5%.

2022

Heading into the 2022 elections, based on results from the 2020 and 2016 presidential elections, the Cook Partisan Voter Index for this district was R+13. This meant that in those two presidential elections, this district's results were 13 percentage points more Republican than the national average. This made Colorado's 4th the 114th most Republican district nationally.

Daily Kos calculated what the results of the 2020 presidential election in this district would have been following redistricting. Joe Biden (D) would have received 39.5% of the vote in this district and Donald Trump (R) would have received 58.0%.

2018

Heading into the 2018 elections, based on results from the 2016 and 2012 presidential elections, the Cook Partisan Voter Index for this district was R+13. This meant that in those two presidential elections, this district's results were 13 percentage points more Republican than the national average. This made Colorado's 4th Congressional District the 106th most Republican nationally.

FiveThirtyEight's September 2018 elasticity score for states and congressional districts measured "how sensitive it is to changes in the national political environment." This district's elasticity score was 1.04. This means that for every 1 point the national political mood moved toward a party, the district was expected to move 1.04 points toward that party.

See also

• Redistricting in Colorado
• Colorado's 4th Congressional District election, 2024
• Colorado's 4th Congressional District election, 2022
• Colorado's 4th Congressional District election, 2020
• Colorado's 4th Congressional District election, 2018

External links

• GovTrack District 4

Footnotes

[show]

Colorado's current delegation to the United States Congress

Senators

Michael Bennet (D)

John Hickenlooper (D)

Representatives

District 1

Diana DeGette (D)

District 2

Joe Neguse (D)

District 3

Jeff Hurd (R)

District 4

Lauren Boebert (R)

District 5

Jeff Crank (R)

District 6

Jason Crow (D)

District 7

Brittany Pettersen (D)

District 8

Gabe Evans (R)

Democratic Party (6)

Republican Party (4)