COUNTY · NE
Lancaster County, Nebraska
Lancaster County is a county in Nebraska with FIPS code 31109 and an estimated population of 326,716 (Census 2023), 2nd largest of 93 in the state.
County facts
- Name
- Lancaster County
- State
- Nebraska
- Type
- county
- FIPS code
- 31109
- State FIPS
- 31
- Population (2023)
- 326,716
- Change since 2020
- +1.1%
- State rank
- 2 of 93
Population is the Census Bureau’s Vintage 2023 estimate.
Major cities in Lancaster County
Other counties in Nebraska
Questions
What is the FIPS code for Lancaster County?
Lancaster County, Nebraska has the five-digit FIPS code 31109: 31 for the state and 109 for the county.
What state is Lancaster County in?
Lancaster County is in Nebraska.
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.