Missouri's 3rd Congressional District
Missouri · MO-03
Missouri's 3rd Congressional District is one of 8 U.S. House districts in Missouri, represented in Congress by Robert Onder (Republican). It is home to roughly 783,375 people, with a median age of 38. The population is about 84% White. The median household income is $86,688, and 38% of adults 25 and older hold a bachelor’s degree or higher. In the 2024 presidential election it voted solidly Republican (R+27).
Representative
Current U.S. House member (source: house.gov).
Geography
MO-03 is shown in red. Click a neighboring district to open it, or zoom out to explore the country.
By the Polsby-Popper measure, MO-03 is fairly compact compared with other districts.
Presidential results
Two-party presidential vote by district (source: The Downballot).
Who lives here
U.S. Census Bureau, American Community Survey (5-year estimates).
Economy & education
U.S. Census Bureau, American Community Survey (5-year estimates).