COUNTY · TX
Collin County, Texas
Collin County is a county in Texas with FIPS code 48085 and an estimated population of 1,195,359 (Census 2023), 6th largest of 254 in the state.
County facts
- Name
- Collin County
- State
- Texas
- Type
- county
- FIPS code
- 48085
- State FIPS
- 48
- Population (2023)
- 1,195,359
- Change since 2020
- +11.1%
- State rank
- 6 of 254
Population is the Census Bureau’s Vintage 2023 estimate.
Major cities in Collin County
Other counties in Texas
Questions
What is the FIPS code for Collin County?
Collin County, Texas has the five-digit FIPS code 48085: 48 for the state and 085 for the county.
What state is Collin County in?
Collin County is in Texas.
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.