COUNTY · OK
Seminole County, Oklahoma
Seminole County is a county in Oklahoma with FIPS code 40133 and an estimated population of 23,565 (Census 2023), 37th largest of 77 in the state.
County facts
- Name
- Seminole County
- State
- Oklahoma
- Type
- county
- FIPS code
- 40133
- State FIPS
- 40
- Population (2023)
- 23,565
- Change since 2020
- +0.2%
- State rank
- 37 of 77
Population is the Census Bureau’s Vintage 2023 estimate.
Questions
What is the FIPS code for Seminole County?
Seminole County, Oklahoma has the five-digit FIPS code 40133: 40 for the state and 133 for the county.
What state is Seminole County in?
Seminole County is in Oklahoma.
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.