COUNTY · WI
Oconto County, Wisconsin
Oconto County is a county in Wisconsin with FIPS code 55083 and an estimated population of 39,775 (Census 2023), 38th largest of 72 in the state.
County facts
- Name
- Oconto County
- State
- Wisconsin
- Type
- county
- FIPS code
- 55083
- State FIPS
- 55
- Population (2023)
- 39,775
- Change since 2020
- +1.8%
- State rank
- 38 of 72
Population is the Census Bureau’s Vintage 2023 estimate.
Questions
What is the FIPS code for Oconto County?
Oconto County, Wisconsin has the five-digit FIPS code 55083: 55 for the state and 083 for the county.
What state is Oconto County in?
Oconto 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.