Bethlehem
- County:
- Lehigh County
- County Seat:
- No
- Area (mi²):
- 19.115
- State:
- Pennsylvania
Bethlehem is a city located in Lehigh County, Pennsylvania. Bethlehem has a 2026 population of 79,453. Bethlehem is currently growing at a rate of 0.78% annually and its population has increased by 4.95% since the most recent census, which recorded a population of 75,706 in 2020.