COUNTY · WY
Crook County, Wyoming
Crook County is a county in Wyoming with FIPS code 56011 and an estimated population of 7,592 (Census 2023), 20th largest of 23 in the state.
County facts
- Name
- Crook County
- State
- Wyoming
- Type
- county
- FIPS code
- 56011
- State FIPS
- 56
- Population (2023)
- 7,592
- Change since 2020
- +5.8%
- State rank
- 20 of 23
Population is the Census Bureau’s Vintage 2023 estimate.
Questions
What is the FIPS code for Crook County?
Crook County, Wyoming has the five-digit FIPS code 56011: 56 for the state and 011 for the county.
What state is Crook County in?
Crook County is in Wyoming.
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.