COUNTY · TX
McMullen County, Texas
McMullen County is a county in Texas with FIPS code 48311 and an estimated population of 568 (Census 2023), 251st largest of 254 in the state.
County facts
- Name
- McMullen County
- State
- Texas
- Type
- county
- FIPS code
- 48311
- State FIPS
- 48
- Population (2023)
- 568
- Change since 2020
- -4.9%
- State rank
- 251 of 254
Population is the Census Bureau’s Vintage 2023 estimate.
Questions
What is the FIPS code for McMullen County?
McMullen County, Texas has the five-digit FIPS code 48311: 48 for the state and 311 for the county.
What state is McMullen County in?
McMullen 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.