Bethlehem population
Bethlehem, Pennsylvania had an estimated 79,644 residents on July 1, 2025, the 482nd-largest city in the US. That is up 6.2% since the 2010 Census and up 12.2% since 2000.
- Population, July 2025
- 79,644+5.1% since April 2020
- People per sq mile
- 4,16719.1 sq mi of land
- Median age
- 36.118.9% are 65 or older
- Households with kids
- 23.6%with anyone under 18
Population by year, 2000 to 2025
| Year | Population | Change | Basis |
|---|---|---|---|
| 2025 | 79,644 | +267 | Estimate, July 1 |
| 2024 | 79,377 | +617 | Estimate, July 1 |
| 2023 | 78,760 | +1,037 | Estimate, July 1 |
| 2022 | 77,723 | -193 | Estimate, July 1 |
| 2021 | 77,916 | +2,128 | Estimate, July 1 |
| 2020 | 75,788 | +218 | April 2020 estimates base |
| 2019 | 75,570 | -252 | Estimate, July 1 |
| 2018 | 75,822 | +192 | Estimate, July 1 |
| 2017 | 75,630 | +293 | Estimate, July 1 |
| 2016 | 75,337 | +334 | Estimate, July 1 |
| 2015 | 75,003 | +11 | Estimate, July 1 |
| 2014 | 74,992 | +118 | Estimate, July 1 |
| 2013 | 74,874 | -178 | Estimate, July 1 |
| 2012 | 75,052 | -12 | Estimate, July 1 |
| 2011 | 75,064 | +82 | Estimate, July 1 |
| 2010 | 74,982 | +45 | 2010 Census (April 1) |
| 2009 | 74,937 | +72 | Estimate, July 1 |
| 2008 | 74,865 | +194 | Estimate, July 1 |
| 2007 | 74,671 | +452 | Estimate, July 1 |
| 2006 | 74,219 | +803 | Estimate, July 1 |
| 2005 | 73,416 | +614 | Estimate, July 1 |
| 2004 | 72,802 | +805 | Estimate, July 1 |
| 2003 | 71,997 | +535 | Estimate, July 1 |
| 2002 | 71,462 | +453 | Estimate, July 1 |
| 2001 | 71,009 | +43 | Estimate, July 1 |
| 2000 | 70,966 | April 2000 estimates base |
Year-to-year changes across 2010 and 2020 mix census counts with estimates, so small jumps at those years are partly method changes.
Frequently asked questions
What is the population of Bethlehem in 2025?
The Census Bureau estimates Bethlehem had 79,644 residents on July 1, 2025, making it the 482nd-largest city in the US.
Is Bethlehem growing?
Yes. Bethlehem has grown 6.2% since the 2010 Census (74,982 people), and grown 5.1% since 2020.
What was the population of Bethlehem in 2000?
About 70,966 (the Census Bureau's April 2000 estimates base). By the 2010 Census it was 74,982.
How dense is Bethlehem?
Bethlehem has about 4,167 people per square mile of land (19.1 square miles).
More about Bethlehem
See cost of living, jobs and commutes in Bethlehem, Bethlehem weather by month, or every Bethlehem ZIP code. For the biggest cities in the country, see the largest US cities.