Iowa Congressional Delegation: 4 Representatives, 2 Senators
Embed this widgetLast updated: 2026-09-07
House Delegation
4
U.S. Representatives
4 Republicans
Senate Delegation
2
U.S. Senators
2 Republicans
Delegation at a Glance
Iowa sends 6 members to Congress: 4 representatives in the House (4 Republicans) and 2 Senators in the Senate (2 Republicans).
- With 4 U.S. Representatives, Iowa has the 30th-largest House delegation among the 50 states (tied with 5 other states).
- Members of Iowa's delegation have served an average of 13.3 years in Congress.
State Highlights
- Chuck Grassley is Iowa's longest-serving current member of Congress — in office since 1975 (51 years total).
- In the 2024 presidential election, Trump carried Iowa by 13.2 points.
- Joni Ernst is on the ballot for re-election in 2026.
Iowa has 4 representatives in the U.S. House. Iowa is represented by 2 U.S. Senators: Chuck Grassley (Republican) and Joni Ernst (Republican). Senators serve 6-year terms and representatives serve 2-year terms — see term end dates and election timing for each seat below.
Learn more about congressional term lengths, the Senate class schedule, or the upcoming 2026 election cycle.
2026 Election Picture for Iowa
Iowa's 2026 primary was held on June 2, 2026. Joni Ernst (Republican) is up for re-election to the U.S. Senate in 2026. All 4 of Iowa's U.S. House seats are on the ballot in 2026, since House terms are two years. The general election is November 3, 2026.
2026 is a midterm election year — it falls in the middle of the presidential term, so there is no presidential race on Iowa's 2026 ballot. Every U.S. House seat nationwide is on the ballot every two years, and roughly a third of U.S. Senate seats — whichever class is next in rotation — are up in every congressional election, midterm or presidential.
Full Iowa 2026 primary details · Election Day countdown · How midterm elections work
Senate Class Breakdown
U.S. Senators serve staggered 6-year terms split into three classes, so a state's two Senate seats usually aren't on the ballot in the same year. Iowa's two Senate seats are staggered across different classes.
The staggered system dates to the Constitution's framers, who wanted the Senate to change gradually rather than all at once — unlike the House, where every seat turns over every two years. Roughly one-third of the Senate's 100 seats (whichever class is next up) is on the ballot in any given election year, which is why only some states have a Senate race in any particular cycle.
- Chuck Grassley is Class 3 — next up for election in 2028.
- Joni Ernst is Class 2 — next up for election in 2026.
Learn more about the Senate class schedule.
Senators
Representatives
4 total
How to Contact Iowa's Delegation
Every member of Congress can be reached through the U.S. Capitol switchboard at (202) 224-3121 — ask the operator to connect you to any senator or representative by name, and you will be transferred directly to their office. Each member listed above also has a direct Washington, D.C. office line on their individual page, which staff typically answer during business hours (9am–5pm Eastern).
Congressional staff log the position of every caller, so calling or writing is one of the most direct ways for a constituent to weigh in on legislation before Iowa's delegation votes on it.
Related
Frequently Asked Questions
Who are Iowa's senators?
As of 2026-09-07, Iowa's U.S. Senators are Chuck Grassley (Republican) and Joni Ernst (Republican). Party breakdown: 2 Republicans.
How many representatives does Iowa have?
Iowa has 4 representatives in the U.S. House as of 2026-09-07, the 30th-largest House delegation among the 50 states (tied with 5 other states). House seats are reapportioned among the states after each decennial census based on population.
When is Iowa's 2026 primary?
Iowa's 2026 primary was held on June 2, 2026. A U.S. Senate seat is on the ballot this cycle, and all 4 of Iowa's U.S. House seats are also up for election in 2026, since House terms are two years.
Is Iowa's congressional delegation Democratic or Republican?
As of 2026-09-07, Iowa's entire congressional delegation — all 6 members — is Republican, giving Republicans unified control of Iowa's seats in Congress.
Who represents Iowa in Congress?
Iowa is represented in Congress by 4 U.S. Representatives in the House (4 Republicans) and 2 U.S. Senators in the Senate. See the full current roster below, including term end dates and contact information.