Northumberland Flag

Northumberland

County Seat:
No
Area (mi²):
1.61
State:
Pennsylvania

Northumberland is a borough located in Northumberland County, Pennsylvania. Northumberland has a 2026 population of 3,835. Northumberland is currently declining at a rate of -0.1% annually and its population has decreased by -1.79% since the most recent census, which recorded a population of 3,905 in 2020.

3.8K
Total Population
2,382
Density (mi²)
-4 -0.1%
Growth

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)