Iowa's 3rd Congressional District
Iowa · IA-03
Iowa's 3rd Congressional District is one of 4 U.S. House districts in Iowa, represented in Congress by Zachary Nunn (Republican). It is home to roughly 806,699 people, with a median age of 37.3. The population is about 79% White. The median household income is $79,023, and 36% of adults 25 and older hold a bachelor’s degree or higher. In the 2024 presidential election the district was highly competitive (R+4).
Representative
Current U.S. House member (source: house.gov).
Geography
IA-03 is shown in red. Click a neighboring district to open it, or zoom out to explore the country.
Covering 10,734 square miles, IA-03 is the 69th-largest of the 435 congressional districts by land area. With about 75 residents per square mile, it is a predominantly rural district. Its shape is fairly compact: the district's Polsby-Popper score of 0.35 ranks 118th of 435 nationally, where 1st is the most compact.
Presidential results
In the 2024 presidential election, 47% of IA-03 voters backed Kamala Harris and 52% Donald Trump — a R+4 margin, the 36th-closest result of any district in the country. That is a 3.7-point shift toward the Republicans from 2020, when the district voted R+0.3.
Two-party presidential vote by district (source: The Downballot).
Who lives here
The median resident of the district is 37.3 years old; 24.6% of residents are under 18 and 15.4% are 65 or older. About 8.2% of residents were born outside the United States, and 12.3% speak a language other than English at home.
U.S. Census Bureau, American Community Survey (5-year estimates).
Economy & education
At $79,023, the district's median household income ranks 203rd of 435 districts nationwide. The typical owner-occupied home is worth $229,227, and the median rent is $1,072 a month. 10.3% of residents live below the poverty line, and workers average a 21.9-minute commute (13.1% work from home).
U.S. Census Bureau, American Community Survey (5-year estimates).