COUNTY · IA
Monroe County, Iowa
Monroe County is a county in Iowa with FIPS code 19135 and an estimated population of 7,504 (Census 2023), 87th largest of 99 in the state.
County facts
- Name
- Monroe County
- State
- Iowa
- Type
- county
- FIPS code
- 19135
- State FIPS
- 19
- Population (2023)
- 7,504
- Change since 2020
- -1.2%
- State rank
- 87 of 99
Population is the Census Bureau’s Vintage 2023 estimate.
Questions
What is the FIPS code for Monroe County?
Monroe County, Iowa has the five-digit FIPS code 19135: 19 for the state and 135 for the county.
What state is Monroe County in?
Monroe County is in Iowa.
How do I know if an address is in this county?
Use the address lookup. ZIP codes and city names can cross county lines, so an address is the reliable check.
Sources: U.S. Census Bureau geographic reference files; Census Bureau Population Estimates, Vintage 2023. Last reviewed 2026-10-27.