COUNTY · WI
Vernon County, Wisconsin
Vernon County is a county in Wisconsin with FIPS code 55123 and an estimated population of 31,170 (Census 2023), 42nd largest of 72 in the state.
County facts
- Name
- Vernon County
- State
- Wisconsin
- Type
- county
- FIPS code
- 55123
- State FIPS
- 55
- Population (2023)
- 31,170
- Change since 2020
- +1.5%
- State rank
- 42 of 72
Population is the Census Bureau’s Vintage 2023 estimate.
Questions
What is the FIPS code for Vernon County?
Vernon County, Wisconsin has the five-digit FIPS code 55123: 55 for the state and 123 for the county.
What state is Vernon County in?
Vernon County is in Wisconsin.
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.