
Herndon
- County:
- Northumberland County
- County Seat:
- No
- Area (mi²):
- 0.791
- State:
- Pennsylvania
Herndon is a borough located in Northumberland County, Pennsylvania. Herndon has a 2025 population of 340. Herndon is currently declining at a rate of -0.58% annually and its population has decreased by -2.86% since the most recent census, which recorded a population of 350 in 2020.
The average household income in Herndon is $76,453 with a poverty rate of 13.86%. The median age in Herndon is 46.8 years: 47 years for males, and 45.8 years for females.