Maryland's 1st Congressional District

Maryland's 1st Congressional District

Incumbent

Andrew Harris

Assumed office: January 3, 2011

Maryland's 1st Congressional District in the United States House of Representatives is represented by Andrew Harris (R).

As of the 2020 Census, Maryland representatives represented an average of 773,160 residents. After the 2010 Census, each member represented 723,741 residents.

Elections

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

See also: Maryland's 1st Congressional District election, 2030

There are no official candidates yet for this election.

See also: Maryland's 1st Congressional District election, 2028

There are no official candidates yet for this election.

See also: Maryland's 1st Congressional District election, 2026

General election

The primary will occur on June 23, 2026. The general election will occur on November 3, 2026. General election candidates will be added here following the primary.

Democratic primary

Democratic primary for U.S. House Maryland District 1

Victor Guidice (D), Terrence Rogers (D), Dan Schwartz (D), George Walish (D), and Randi White (D) are running in the Democratic primary for U.S. House Maryland District 1 on June 23, 2026.

		Candidate
	Submit photo	Victor Guidice
		Terrence Rogers
		Dan Schwartz
		George Walish
		Randi White

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

Republican primary for U.S. House Maryland District 1

Incumbent Andrew Harris (R) is running in the Republican primary for U.S. House Maryland District 1 on June 23, 2026.

		Candidate
		Andrew Harris

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	Incumbents are bolded and underlined.
= candidate completed the Ballotpedia Candidate Connection survey.
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See also: Maryland's 1st Congressional District election, 2024

General election

General election for U.S. House Maryland District 1

Incumbent Andrew Harris (R) defeated Blane Miller III (D) and Joshua O'Brien (L) in the general election for U.S. House Maryland District 1 on November 5, 2024.

		Candidate	%	Votes
✔		Andrew Harris (R)	59.6	246,356
		Blane Miller III (D)	37.5	154,985
		Joshua O'Brien (L)	2.7	11,053
		Other/Write-in votes	0.2%	675

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	Incumbents are bolded and underlined. The results have been certified. Source	Total votes: 413,069
= candidate completed the Ballotpedia Candidate Connection survey.
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Withdrawn or disqualified candidates

• Christen Johnson (Unaffiliated)

Democratic primary

Democratic primary for U.S. House Maryland District 1

Blane Miller III (D) defeated Blessing Oluwadare (D) in the Democratic primary for U.S. House Maryland District 1 on May 14, 2024.

		Candidate	%	Votes
✔		Blane Miller III	60.8	26,845
		Blessing Oluwadare	39.2	17,289

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	There were no incumbents in this race. The results have been certified. Source	Total votes: 44,134
= candidate completed the Ballotpedia Candidate Connection survey.
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Withdrawn or disqualified candidates

• Isaac Toyos (D)

Republican primary

Republican primary for U.S. House Maryland District 1

Incumbent Andrew Harris (R) defeated Christopher Bruneau (R) and Michael Lemon (R) in the Republican primary for U.S. House Maryland District 1 on May 14, 2024.

		Candidate	%	Votes
✔		Andrew Harris	77.4	57,010
		Christopher Bruneau	16.2	11,946
		Michael Lemon	6.4	4,714

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	Incumbents are bolded and underlined. The results have been certified. Source	Total votes: 73,670
= candidate completed the Ballotpedia Candidate Connection survey.
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Withdrawn or disqualified candidates

• Blessing Oluwadare (R)

See also: Maryland's 1st Congressional District election, 2022

General election

General election for U.S. House Maryland District 1

Incumbent Andrew Harris (R) defeated Heather Mizeur (D) and Daniel Thibeault (L) in the general election for U.S. House Maryland District 1 on November 8, 2022.

		Candidate	%	Votes
✔		Andrew Harris (R)	54.4	159,673
		Heather Mizeur (D)	43.1	126,511
		Daniel Thibeault (L)	2.4	6,924
		Other/Write-in votes	0.1%	250

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	Incumbents are bolded and underlined. The results have been certified. Source	Total votes: 293,358
= candidate completed the Ballotpedia Candidate Connection survey.
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Withdrawn or disqualified candidates

• George Gluck (G)

Democratic primary

Democratic primary for U.S. House Maryland District 1

Heather Mizeur (D) defeated Dave Harden (D) in the Democratic primary for U.S. House Maryland District 1 on July 19, 2022.

		Candidate	%	Votes
✔		Heather Mizeur	68.8	34,549
		Dave Harden	31.2	15,683

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	There were no incumbents in this race. The results have been certified. Source	Total votes: 50,232
= candidate completed the Ballotpedia Candidate Connection survey.
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Withdrawn or disqualified candidates

• Mia Mason (D)
• Matt Talley (D)

Republican primary

Republican primary for U.S. House Maryland District 1

Incumbent Andrew Harris (R) advanced from the Republican primary for U.S. House Maryland District 1 on July 19, 2022.

		Candidate	%	Votes
✔		Andrew Harris	100.0	67,933

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	Incumbents are bolded and underlined. The results have been certified. Source	Total votes: 67,933
= candidate completed the Ballotpedia Candidate Connection survey.
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See also: Maryland's 1st Congressional District election, 2020

General election

General election for U.S. House Maryland District 1

Incumbent Andrew Harris (R) defeated Mia Mason (D) in the general election for U.S. House Maryland District 1 on November 3, 2020.

		Candidate	%	Votes
✔		Andrew Harris (R)	63.4	250,901
		Mia Mason (D)	36.4	143,877
		Other/Write-in votes	0.2%	746

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	Incumbents are bolded and underlined. The results have been certified. Source	Total votes: 395,524
= candidate completed the Ballotpedia Candidate Connection survey.
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Democratic primary

Democratic primary for U.S. House Maryland District 1

Mia Mason (D) defeated Allison Galbraith (D) (Withdrew, appeared on ballot) and Jennifer Pingley (D) in the Democratic primary for U.S. House Maryland District 1 on June 2, 2020.

		Candidate	%	Votes
✔		Mia Mason	42.8	25,772
		Allison Galbraith (Withdrew, appeared on ballot)	37.2	22,386
	Submit photo	Jennifer Pingley	20.0	12,040

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	There were no incumbents in this race. The results have been certified. Source	Total votes: 60,198
= candidate completed the Ballotpedia Candidate Connection survey.
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Withdrawn or disqualified candidates

• Erik Lane (D)

Republican primary

Republican primary for U.S. House Maryland District 1

Incumbent Andrew Harris (R) defeated Jorge Delgado (R) in the Republican primary for U.S. House Maryland District 1 on June 2, 2020.

		Candidate	%	Votes
✔		Andrew Harris	81.6	72,265
	Submit photo	Jorge Delgado	18.4	16,281

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	Incumbents are bolded and underlined. The results have been certified. Source	Total votes: 88,546
= candidate completed the Ballotpedia Candidate Connection survey.
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See also: United States House of Representatives elections in Maryland, 2018

General election

General election for U.S. House Maryland District 1

Incumbent Andrew Harris (R) defeated Jesse Colvin (D) and Jenica Martin (L) in the general election for U.S. House Maryland District 1 on November 6, 2018.

		Candidate	%	Votes
✔		Andrew Harris (R)	60.0	183,662
		Jesse Colvin (D)	38.1	116,631
		Jenica Martin (L)	1.9	5,744
		Other/Write-in votes	0.0%	149

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	Incumbents are bolded and underlined. The results have been certified. Source	Total votes: 306,186 (100% precincts reporting)
= candidate completed the Ballotpedia Candidate Connection survey.
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Democratic primary

Democratic primary for U.S. House Maryland District 1

The following candidates ran in the Democratic primary for U.S. House Maryland District 1 on June 26, 2018.

		Candidate	%	Votes
✔		Jesse Colvin	37.8	14,075
		Allison Galbraith	28.1	10,440
	Submit photo	Michael Brown	15.1	5,600
		Michael Pullen	13.0	4,819
		Steve Worton	3.9	1,442
		Erik Lane	2.2	815

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	There were no incumbents in this race. The results have been certified.	Total votes: 37,191
= candidate completed the Ballotpedia Candidate Connection survey.
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Republican primary

Republican primary for U.S. House Maryland District 1

Incumbent Andrew Harris (R) defeated Martin Elborn (R) and Lamont Taylor (R) in the Republican primary for U.S. House Maryland District 1 on June 26, 2018.

		Candidate	%	Votes
✔		Andrew Harris	85.8	48,944
		Martin Elborn	9.8	5,606
		Lamont Taylor	4.4	2,496

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	Incumbents are bolded and underlined. The results have been certified.	Total votes: 57,046
= candidate completed the Ballotpedia Candidate Connection survey.
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Previous election results

2016

See also: Maryland's 1st Congressional District election, 2016

Heading into the election, Ballotpedia rated this race as safely Republican. In Maryland's 1st Congressional District, incumbent Andrew Harris defeated challengers Joe Werner (D) and Matt Beers (L) in the general election on November 8, 2016. Harris defeated Jonathan Goff, Jr., Sean M. Jackson, and Mike Smigiel in the Republican primary, while Werner defeated Jim Ireton to win the Democratic nomination. The primary elections took place on April 26, 2016.

U.S. House, Maryland District 1 General Election, 2016

Party		Candidate	Vote %	Votes
	Republican	Andy Harris Incumbent	67%	242,574
	Democratic	Joe Werner	28.6%	103,622
	Libertarian	Matt Beers	4.2%	15,370
	N/A	Write-in	0.1%	531
Total Votes				362,097
Source: Maryland State Board of Elections

U.S. House, Maryland District 1 Democratic Primary, 2016

Candidate	Vote %	Votes
Joe Werner	51%	29,729
Jim Ireton	49%	28,547
Total Votes		58,276
Source: Maryland State Board of Elections

U.S. House, Maryland District 1 Republican Primary, 2016

Candidate	Vote %	Votes
Andy Harris Incumbent	78.4%	79,497
Mike Smigiel	10.7%	10,897
Jonathan Goff	6%	6,135
Sean Jackson	4.8%	4,891
Total Votes		101,420
Source: Maryland State Board of Elections

2014

See also: Maryland's 1st Congressional District elections, 2014

The 1st Congressional District of Maryland held an election for the U.S. House of Representatives on November 4, 2014. Incumbent Andrew Harris (R) defeated challenger Bill Tilghman (D) in the general election.

U.S. House, Maryland District 1 General Election, 2014

Party		Candidate	Vote %	Votes
	Republican	Andy Harris Incumbent	70.5%	176,342
	Democratic	Bill Tilghman	29.5%	73,843
Total Votes				250,185
Source: Maryland Secretary of State Official Results

General election candidates

• Andrew Harris - Incumbent a
• Bill Tilghman

June 24, 2014, primary results

Republican Primary

• Andrew Harris - Incumbenta
• Jonathan Goff, Jr.

Democratic Primary

• John LaFerla
• Bill Tilghmana

Withdrew from race

• Kim Letke

2012

See also: Maryland's 1st Congressional District elections, 2012

The 1st Congressional District of Maryland held an election for the U.S. House of Representatives on November 6, 2012, in which incumbent Andrew Harris (R) won re-election. He defeated John LaFerla (D), Muir Boda (L), Michael Calpino (I) and Douglas Dryden Rae (I) in the general election.

U.S. House, Maryland District 1 General Election, 2012

Party		Candidate	Vote %	Votes
	Republican	Andy Harris Incumbent	63.4%	214,204
	Democratic	Wendy Rosen	27.5%	92,812
	Libertarian	Muir Boda	3.8%	12,857
	Democratic	John LaFerla (Write-in)	4.4%	14,858
	Independent	Michael Calpino (Write-in)	0%	71
	Independent	Douglas Dryden Rae (Write-in)	0%	26
	N/A	Other Write-ins	0.9%	2,932
Total Votes				337,760
Source: Maryland State Board of Elections "Representative in Congress"

2010
On November 2, 2010, Andy Harris won election to the United States House. He defeated Frank Kratovil, Jr (D), Richard James Davis (L) and write-in candidates in the general election.

U.S. House, Maryland District 1 General Election, 2010
Party		Candidate	Vote %	Votes
	Republican	Andy Harris	54.1%	155,118
	Democratic	Frank Kratovil, Jr.	42%	120,400
	Libertarian	Richard James Davis	3.8%	10,876
	N/A	Write-in	0.1%	242
	N/A	Jack N. Wilson (Write-in)	0.1%	158
	N/A	Michael Kennedy (Write-in)	0%	18
Total Votes				286,812

2008
On November 4, 2008, Frank M. Kratovil, Jr. won election to the United States House. He defeated Andy Harris (R) and Richard James Davis (L) in the general election.

U.S. House, Maryland District 1 General Election, 2008
Party		Candidate	Vote %	Votes
	Democratic	Frank M. Kratovil, Jr.	49.1%	177,065
	Republican	Andy Harris	48.3%	174,213
	Libertarian	Richard James Davis	2.5%	8,873
	N/A	Write-in	0.1%	329
Total Votes				360,480

2006
On November 7, 2006, Wayne T. Gilchrest won re-election to the United States House. He defeated Jim Corwin (D) in the general election.

U.S. House, Maryland District 1 General Election, 2006
Party		Candidate	Vote %	Votes
	Republican	Wayne T. Gilchrest incumbent	68.8%	185,177
	Democratic	Jim Corwin	31.1%	83,738
	N/A	Write-in	0.1%	232
Total Votes				269,147

2004
On November 2, 2004, Wayne T. Gilchrest won re-election to the United States House. He defeated Kostas Alexakis (D) in the general election.

U.S. House, Maryland District 1 General Election, 2004
Party		Candidate	Vote %	Votes
	Republican	Wayne T. Gilchrest incumbent	75.9%	245,149
	Democratic	Kostas Alexakis	24.1%	77,872
Total Votes				323,021

2002
On November 5, 2002, Wayne T. Gilchrest won re-election to the United States House. He defeated Amy D. Tamlyn (D) in the general election.

U.S. House, Maryland District 1 General Election, 2002
Party		Candidate	Vote %	Votes
	Republican	Wayne T. Gilchrest incumbent	76.8%	192,004
	Democratic	Amy D. Tamlyn	23.2%	57,986
Total Votes				249,990

2000
On November 7, 2000, Wayne T. Gilchrest won re-election to the United States House. He defeated Bennett Bozman (D) and David M. Gross (Green) in the general election.

U.S. House, Maryland District 1 General Election, 2000
Party		Candidate	Vote %	Votes
	Republican	Wayne T. Gilchrest incumbent	64.4%	165,293
	Democratic	Bennett Bozman	35.5%	91,022
	Green	David M. Gross	0%	73
	N/A	Write-in	0.1%	294
Total Votes				256,682

District map

Redistricting

2020-2021

See also: Redistricting in Maryland after the 2020 census

Maryland adopted new congressional district boundaries on April 4, 2022, when Gov. Larry Hogan (R) signed revised redistricting legislation that the General Assembly had finalized on March 30, 2022. Hogan signed the new map after state Attorney General Brian Frosh withdrew his appeal of Circuit Court Judge Lynne Battaglia's ruling overturning the state's previous congressional redistricting plan. The state Senate approved the revised congressional district boundaries 30-13 with all votes in favor by Democrats and all votes opposed by Republicans on March 29, 2022. The House of Delegates approved the revised map on March 30, 2022, by a vote of 94-41 with all 'yes' votes by Democrats and 40 Republicans and one Democrat voting 'no.'

How does redistricting in Maryland work? In Maryland, the primary authority to adopt both congressional and state legislative district lines rests with the state legislature. The governor submits a state legislative redistricting proposal (an advisory commission appointed by the governor assists in drafting this proposal). The state legislature may pass its own plan by joint resolution, which is not subject to gubernatorial veto. If the legislature fails to approve its own plan, the governor's plan takes effect. Congressional lines are adopted solely by the legislature and may be vetoed by the governor.

The Maryland Constitution requires that state legislative districts be contiguous, compact, and "give 'due regard' for political boundaries and natural features." No such requirements apply to congressional districts.

2020

2024

2010-2011

This is the 1st Congressional District of Maryland after the 2001 redistricting process.

See also: Redistricting in Maryland after the 2010 census

In 2011, the Maryland 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+8. This meant that in those two presidential elections, this district's results were 8 percentage points more Republican than the national average. This made Maryland's 1st the 150th 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+11. This meant that in those two presidential elections, this district's results were 11 percentage points more Republican than the national average. This made Maryland's 1st the 140th 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) 56.3%-41.7%.

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+11. This meant that in those two presidential elections, this district's results were 11 percentage points more Republican than the national average. This made Maryland's 1st the 141st 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 41.7% of the vote in this district and Donald Trump (R) would have received 56.3%.

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+14. This meant that in those two presidential elections, this district's results were 14 percentage points more Republican than the national average. This made Maryland's 1st Congressional District the 90th 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 1.11. This means that for every 1 point the national political mood moved toward a party, the district was expected to move 1.11 points toward that party.

See also

• Redistricting in Maryland
• Maryland's 1st Congressional District election, 2024
• Maryland's 1st Congressional District election, 2022
• Maryland's 1st Congressional District election, 2020
• Maryland's 1st Congressional District election, 2018

External links

• GovTrack District 1

Footnotes

[show]

Maryland's current delegation to the United States Congress

Senators

Angela Alsobrooks (D)

Chris Hollen (D)

Representatives

District 1

Andrew Harris (R)

District 2

John Olszewski (D)

District 3

Sarah Elfreth (D)

District 4

Glenn Ivey (D)

District 5

Steny Hoyer (D)

District 6

April McClain-Delaney (D)

District 7

Kweisi Mfume (D)

District 8

Jamie Raskin (D)

Democratic Party (9)

Republican Party (1)