COUNTY · PA
Lehigh County, Pennsylvania
Lehigh County is a county in Pennsylvania with FIPS code 42077 and an estimated population of 377,754 (Census 2023), 10th largest of 67 in the state.
County facts
- Name
- Lehigh County
- State
- Pennsylvania
- Type
- county
- FIPS code
- 42077
- State FIPS
- 42
- Population (2023)
- 377,754
- Change since 2020
- +0.9%
- State rank
- 10 of 67
Population is the Census Bureau’s Vintage 2023 estimate.
Questions
What is the FIPS code for Lehigh County?
Lehigh County, Pennsylvania has the five-digit FIPS code 42077: 42 for the state and 077 for the county.
What state is Lehigh County in?
Lehigh County is in Pennsylvania.
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.