Iowa state legislative districts
 |
List of state legislative districts |
There are 150 seats in the Iowa General Assembly. 125 seats, 25 of the Iowa State Senate and all 100 of the Iowa House of Representatives, are up for election every two years.
Chambers
Click the following tabs for more information about each chamber:
Senate
The Iowa Senate is the upper house of the Iowa General Assembly. There are 50 members of the Senate, representing fifty single-member districts across the state.
As of the 2020 Census, Iowa state senators represented an average of 63,848 residents. After the 2010 Census, each member represented 61,076 residents.
Qualifications
The Iowa Constitution states, "Senators shall be chosen for the term of four years, at the same time and place as representatives; they shall be twenty-five years of age, and possess the qualifications of representatives as to residence and citizenship."[1]
Vacancies
If there is a vacancy in the Iowa General Assembly, the vacant seat must be filled by a special election. The governor of Iowa is required within five days of a vacancy in the General Assembly to call for a special election. If the vacancy happens in session or within 45 days of the session convening, the governor must call for an election as soon as possible with at least an 18-day notice. All other special elections require a 40-day notice as long the election does not happen on the same day as a school election within the district.[2]
See sources: Iowa Code § 69.14
Salaries
- See also: Comparison of state legislative salaries
| State legislative salaries, 2024[3] | |
|---|---|
| Salary | Per diem |
| $25,000/year | $178/day for legislators who live outside of Polk County. $133.50/day for legislators who live within Polk County. |
Districts
These are links to every district in the Iowa State Senate.
House
The Iowa House of Representatives is the lower house of the Iowa General Assembly. There are 100 members of the House of Representatives.
As of the 2020 Census, Iowa state representatives represented an average of 31,924 residents. After the 2010 Census, each member represented 30,538 residents.
Qualifications
The Iowa Constitution states, "No person shall be a member of the house of representatives who shall not have attained the age of twenty-one years, be a citizen of the United States, and shall have been an inhabitant of this state one year next preceding his election, and at the time of his election shall have had an actual residence of sixty days in the county, or district he may have been chosen to represent."[4]
Vacancies
If there is a vacancy in the Iowa General Assembly, the vacant seat must be filled by a special election. The governor of Iowa is required within five days of a vacancy in the General Assembly to call for a special election. If the vacancy happens in session or within 45 days of the session convening, the governor must call for an election as soon as possible with at least an 18-day notice. All other special elections require a 40-day notice as long the election does not happen on the same day as a school election within the district.[5]
See sources: Iowa Code § 69.14
Salaries
- See also: Comparison of state legislative salaries
| State legislative salaries, 2024[6] | |
|---|---|
| Salary | Per diem |
| $25,000/year | $178/day for legislators who live outside of Polk County. $133.50/day for legislators who live within Polk County. |
Districts
These are links to every district in the Iowa House of Representatives.
Redistricting
The Legislative Services Agency prepares redistricting plans for approval by the Iowa State Legislature. According to All About Redistricting, the Legislative Services Agency (LSA) consists of "civil servants committed to nonpartisanship and otherwise charged with tasks like legal and fiscal analysis of state legislation and state government oversight." The LSA is assisted by a commission, which consists of the following members:[7]
- one member selected by the majority leader of the Iowa State Senate
- one member selected by the majority leader of the Iowa House of Representatives
- one member selected by the minority leader of the Iowa State Senate
- one member selected by the minority leader of the Iowa House of Representatives
- one member selected by the first four members
The members of this commission cannot "hold partisan public office or an office in a political party, and none may be a relative or employee of a federal or state legislator (or the legislature as a whole)."[7]
Working with this commission, the LSA drafts congressional and state legislative district lines. The maps are presented as a single bill to the state legislature, which may approve or reject the bill without altering it (the legislature can provide feedback). If the legislature rejects the plan, the LSA must draft a second proposal. If the legislature rejects the second proposal, the LSA must draft a third, and final, set of maps. If the legislature rejects this plan, it may then approve its own maps. Since the implementation of this process in 1980, the state legislature has never chosen not to approve an LSA proposal. Redistricting plans are also subject to gubernatorial veto. In addition, the legislature may repeal or revise the maps at any time, though it has never done so.[7]
State law establishes the following criteria for both congressional and state legislative districts:[7]
- Districts must be "convenient and contiguous."
- Districts must "preserve the integrity of political subdivisions like counties and cities."
- Districts must "to the extent consistent with other requirements, [be] reasonably compact–defined in terms of regular polygons, comparisons of length and width, and overall boundary perimeter."
In addition, state House districts are required to be contained within state Senate districts "where possible, and where not in conflict with the criteria above." It is explicit in state law that district lines cannot be drawn "to favor a political party, incumbent, or other person or group."[7]
On November 4, 2021, Iowa Gov. Kim Reynolds (R) signed new congressional and state legislative maps into law after the state's Legislative Services Agency had proposed them on October 21, 2021. The Iowa legislature approved the maps on October 28, 2021, by a vote of 48-1 in the state Senate and 93-2 in the state House.[8] The legislature could only vote to approve or reject the maps and could not make any amendments. These maps took effect for Iowa's 2022 congressional and legislative elections.
Senate elections
Iowa state senators serve staggered, four-year terms and half of the Senate is up for election every two years. Iowa holds elections for its legislature in even years.
2026
- See also: Iowa State Senate elections, 2026
Elections for the Iowa State Senate will take place in 2026. The general election is on November 3, 2026.
2024
- See also: Iowa State Senate elections, 2024
Elections for the Iowa State Senate took place in 2024. The general election was on November 5, 2024. The primary was June 4, 2024. The filing deadline was March 15, 2024.
In the 2024 elections, Republicans increased their majority in the Iowa State Senate from 33-16 with one vacancy to 34-15 with one vacancy.
| Iowa State Senate | |||
|---|---|---|---|
| Party | As of November 5, 2024 | After November 6, 2024 | |
| Democratic Party | 16 | 16 | |
| Republican Party | 33 | 34 | |
| Total | 50 | 50 | |
2022
- See also: Iowa State Senate elections, 2022
Elections for the Iowa State Senate took place in 2022. The general election was on November 8, 2022. A primary was scheduled for June 7, 2022. The filing deadline was March 18, 2022.
In the 2022 elections, Republicans increased their majority in the Iowa State Senate from 32-18 to 34-16.
| Iowa State Senate | |||
|---|---|---|---|
| Party | As of November 8, 2022 | After November 9, 2022 | |
| Democratic Party | 18 | 16 | |
| Republican Party | 32 | 34 | |
| Total | 50 | 50 | |
2020
- See also: Iowa State Senate elections, 2020
Elections for the office of Iowa State Senate took place in 2020. The general election was held on November 3, 2020. A primary was scheduled for June 2, 2020. The filing deadline was March 13, 2020.
In the 2020 elections, Republicans retained their 32-18 majority in the Iowa State Senate.
| Iowa State Senate | |||
|---|---|---|---|
| Party | As of November 3, 2020 | After November 4, 2020 | |
| Democratic Party | 18 | 18 | |
| Republican Party | 32 | 32 | |
| Total | 50 | 50 | |
2018
- See also: Iowa State Senate elections, 2018
Elections for the Iowa State Senate took place in 2018. A closed primary election took place on June 5, 2018. The general election was held on November 6, 2018. The candidate filing deadline was March 16, 2018.
In the 2018 elections, Republicans increased their majority in the Iowa State Senate from 29-20 to 32-18.
| Iowa State Senate | |||
|---|---|---|---|
| Party | As of November 6, 2018 | After November 7, 2018 | |
| Democratic Party | 20 | 18 | |
| Republican Party | 29 | 32 | |
| Independent | 1 | 0 | |
| Total | 50 | 50 | |
2016
- See also: Iowa State Senate elections, 2016
Elections for the Iowa State Senate were held in 2016. The primary election took place on June 7, 2016, and the general election was held on November 8, 2016. The candidate filing deadline was March 18, 2016. A total of 25 seats out of the 50 seats in the Iowa State Senate were up for election in 2016.
Republicans won control of the Iowa State Senate, securing a GOP trifecta in the state. Democrats held a three-seat majority in the chamber prior to the election.[9] Republicans picked up six seats, giving them a nine-seat majority.
| Iowa State Senate | |||
|---|---|---|---|
| Party | As of November 7, 2016 | After November 8, 2016 | |
| Democratic Party | 25 | 20 | |
| Republican Party | 23 | 29 | |
| Independent | 1 | 1 | |
| Vacancy | 1 | 0 | |
| Total | 50 | 50 | |
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2014
Elections for the Iowa State Senate took place in 2014. A primary election took place on June 3, 2014. The general election was held on November 4, 2014. The signature filing deadline for candidates wishing to run in this election was March 14, 2014. Heading into the election, Democrats held a 26-24 majority. No partisan change occurred in the election.
2012
Elections for the office of Iowa State Senate took place in 2012. The primary election was held on June 5, 2012, and the general election was held on November 6, 2012. The candidate filing deadline was March 16, 2012. Heading into the election, Democrats held a 26-24 majority. Democrats gained no seats in the election, giving them a 26-23 majority with one vacancy.
2010
Elections for the office of Iowa State Senate took place in 2010. The primary election was held on June 8, 2010, and the general election was held on November 2, 2010. The candidate filing deadline was March 19, 2010. Heading into the election, Democrats held a 32-18 majority. Democrats lost five seats in the election, giving them a 27-23 majority.
In 2010, a total of $5,058,528 was raised in campaign contributions by those running for state Senate. The top donors were:[10]
2008
Elections for the office of Iowa State Senate consisted of a primary election on June 3, 2008, and a general election on November 4, 2008. During the 2008 election, the total value of contributions to Senate candidates was $6,045,502. The top 10 contributors were:[11]
2006
Elections for the office of Iowa State Senate consisted of a primary election on June 6, 2006, and a general election on November 7, 2006. During the 2006 election, the total value of contributions to Senate candidates was $7,456,412. The top 10 contributors were:[12]
2004
Elections for the office of Iowa State Senate consisted of a primary election on June 8, 2004, and a general election on November 2, 2004. During the 2004 election, the total value of contributions to Senate candidates was $7,217,102. The top 10 contributors were:[13]
2002
Elections for the office of Iowa State Senate consisted of a primary election on June 4, 2002, and a general election on November 5, 2002. During the 2002 election, the total value of contributions to Senate candidates was $4,266,190. The top 10 contributors were:[14]
2000
Elections for the office of Iowa State Senate consisted of a primary election on June 6, 2000, and a general election on November 7, 2000. During the 2000 election, the total value of contributions to Senate candidates was $4,079,038. The top 10 contributors were:[15]
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House elections
Iowa state representatives serve two-year terms, with all seats up for election every two years. Iowa holds elections for its legislature in even years.
2026
Elections for the Iowa House of Representatives will take place in 2026. The general election is on November 3, 2026.
2024
Elections for the Iowa House of Representatives took place in 2024. The general election was on November 5, 2024. The primary was June 4, 2024. The filing deadline was March 15, 2024.
In the 2024 general election the Republican Party expanded its majority by three seats, from 64-36 to 67-33.
| Iowa House of Representatives | |||
|---|---|---|---|
| Party | As of November 5, 2024 | After November 6, 2024 | |
| Democratic Party | 36 | 33 | |
| Republican Party | 64 | 66 | |
| Vacancy | 0 | 1 | |
| Total | 100 | 100 | |
2022
Elections for the Iowa House of Representatives took place in 2022. The general election was on November 8, 2022. A primary was scheduled for June 7, 2022. The filing deadline was March 18, 2022.
In the 2022 general election, the Republican Party expanded its majority by four seats, from 60-40 to 64-36.
| Iowa House of Representatives | |||
|---|---|---|---|
| Party | As of November 8, 2022 | After November 9, 2022 | |
| Democratic Party | 40 | 36 | |
| Republican Party | 60 | 64 | |
| Total | 100 | 100 | |
2020
Elections for the office of Iowa House of Representatives took place in 2020. All 100 seats were up for election. Forty-seven were held by Democrats and 53 were held by Republicans.
The general election was held on November 3, 2020. A primary was scheduled for June 2, 2020. The filing deadline was March 13, 2020.
In the 2020 elections, Republicans increased their majority in the Iowa House from 53-47 to 59-41.
| Iowa House of Representatives | |||
|---|---|---|---|
| Party | As of November 3, 2020 | After November 4, 2020 | |
| Democratic Party | 47 | 41 | |
| Republican Party | 53 | 59 | |
| Total | 100 | 100 | |
2018
Elections for the Iowa House of Representatives took place in 2018. A closed primary election took place on June 5, 2018. The general election was held on November 6, 2018. The candidate filing deadline was March 16, 2018.
In the 2018 elections, the Republican majority in the Iowa House of Representatives was reduced from 58-41 to 54-46.
| Iowa House of Representatives | |||
|---|---|---|---|
| Party | As of November 6, 2018 | After November 7, 2018 | |
| Democratic Party | 41 | 46 | |
| Republican Party | 58 | 54 | |
| Vacancy | 1 | 0 | |
| Total | 100 | 100 | |
2016
Elections for the Iowa House of Representatives took place in 2016. The primary election took place on June 7, 2016, and the general election was held on November 8, 2016. The candidate filing deadline was March 18, 2016. All 100 seats in the Iowa House of Representatives were up for election in 2016.
Heading into the election, Republicans held a 57-43 majority. Republicans gained two seats in the election, giving them a 59-41 majority.
| Iowa House of Representatives | |||
|---|---|---|---|
| Party | As of November 7, 2016 | After November 8, 2016 | |
| Democratic Party | 43 | 41 | |
| Republican Party | 57 | 59 | |
| Total | 100 | 100 | |
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2014Elections for the Iowa House of Representatives took place in 2014. A primary election took place on June 3, 2014. The general election was held on November 4, 2014. The signature filing deadline for candidates wishing to run in this election was March 14, 2014. All 100 House seats were up for election in 2014. Heading into the election, Republicans held a 53-47 majority. No partisan change occurred in the election.
2012Elections for the office of Iowa House of Representatives took place in 2012. The primary election was held on June 5, 2012, and the general election was held on November 6, 2012. The candidate filing deadline was March 16, 2012. All 100 House seats were up for election in 2012. Heading into the election, Republicans held a 59-40 majority with one vacancy. Republicans lost six seats in the election, giving them a 53-47 majority.
2010Elections for the office of Iowa House of Representatives took place in 2010. The primary election was held on June 8, 2010, and the general election was held on November 2, 2010. The candidate filing deadline was March 19, 2010. All 100 House seats were up for election in 2010. Heading into the election, Democrats held a 56-44 majority. Democrats lost 14 seats in the election, giving Republicans a 58-42 majority.
In 2010, $13,358,470 in contributions was raised among all campaigns for the state House. The top donors were:[16]
2008Elections for the office of Iowa House of Representatives consisted of a primary election on June 3, 2008, and a general election on November 4, 2008. All 100 House seats were up for election in 2008. During the 2008 election, the total value of contributions to House candidates was $15,474,490. The top 10 contributors were:[17]
2006Elections for the office of Iowa House of Representatives consisted of a primary election on June 6, 2006, and a general election on November 7, 2006. All 100 House seats were up for election in 2006. During the 2006 election, the total value of contributions to House candidates was $10,927,450. The top 10 contributors were:[18]
2004Elections for the office of Iowa House of Representatives consisted of a primary election on June 8, 2004, and a general election on November 2, 2004. All 100 House seats were up for election in 2004. During the 2004 election, the total value of contributions to House candidates was $8,118,332. The top 10 contributors were:[19]
2002Elections for the office of Iowa House of Representatives consisted of a primary election on June 4, 2002, and a general election on November 5, 2002. All 100 House seats were up for election in 2002. During the 2002 election, the total value of contributions to House candidates was $5,507,786. The top 10 contributors were:[20]
2000Elections for the office of Iowa House of Representatives consisted of a primary election on June 6, 2000, and a general election on November 7, 2000. All 100 House seats were up for election in 2000. During the 2000 election, the total value of contributions to House candidates was $5,677,845. The top 10 contributors were:[21]
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District maps
State Senate
State House
See also
- State legislature
- Iowa General Assembly
- Iowa State Senate
- Iowa House of Representatives
- List of Iowa state legislative elections
Footnotes
- ↑ Iowa Constitution, "Article 3, Section 5," accessed May 21, 2025
- ↑ Iowa General Assembly, "Iowa Code - 2021," accessed February 9, 2021 (Statute 69.14)
- ↑ National Conference of State Legislatures, "2024 Legislator Compensation," August 21, 2024
- ↑ Iowa Constitution, "Article 3, Section 4," accessed May 21, 2025
- ↑ Iowa General Assembly, "Iowa Code - 2021," accessed February 9, 2021 (Statute 69.14)
- ↑ National Conference of State Legislatures, "2024 Legislator Compensation," August 21, 2024
- ↑ 7.0 7.1 7.2 7.3 7.4 All About Redistricting, "Iowa," accessed April 21, 2015
- ↑ Des Moines Register, "Iowa lawmakers accept second redistricting plan, setting up next decade of politics," October 28, 2021
- ↑ Attributes the one vacancy to the party that previously held the seat.
- ↑ Follow the Money, "Iowa Senate 2010 Campaign Contributions," accessed July 20, 2015
- ↑ Follow the Money, "Iowa 2008 Candidates," accessed August 23, 2013
- ↑ Follow the Money, "Iowa 2006 Candidates," accessed August 23, 2013
- ↑ Follow the Money, "Iowa 2004 Candidates," accessed August 23, 2013
- ↑ Follow the Money, "Iowa 2002 Candidates," accessed August 23, 2013
- ↑ Follow the Money, "Iowa 2000 Candidates," accessed August 23, 2013
- ↑ Follow the Money: "Iowa House 2010 Campaign Contributions"
- ↑ Follow the Money, "Iowa 2008 Candidates," accessed August 23, 2013
- ↑ Follow the Money, "Iowa 2006 Candidates," accessed August 23, 2013
- ↑ Follow the Money, "Iowa 2004 Candidates," accessed August 23, 2013
- ↑ Follow the Money, "Iowa 2002 Candidates," accessed August 23, 2013
- ↑ Follow the Money, "Iowa 2000 Candidates," accessed August 23, 2013
