COUNTY · TX
Montgomery County, Texas
Montgomery County is a county in Texas with FIPS code 48339 and an estimated population of 711,354 (Census 2023), 11th largest of 254 in the state.
County facts
- Name
- Montgomery County
- State
- Texas
- Type
- county
- FIPS code
- 48339
- State FIPS
- 48
- Population (2023)
- 711,354
- Change since 2020
- +13.8%
- State rank
- 11 of 254
Population is the Census Bureau’s Vintage 2023 estimate.
Questions
What is the FIPS code for Montgomery County?
Montgomery County, Texas has the five-digit FIPS code 48339: 48 for the state and 339 for the county.
What state is Montgomery County in?
Montgomery 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.