Irwin Flag

Irwin

County Seat:
No
Area (mi²):
0.837
State:
Pennsylvania

Irwin is a borough located in Westmoreland County, Pennsylvania. Irwin has a 2026 population of 3,798. Irwin is currently declining at a rate of -0.34% annually and its population has decreased by -2.09% since the most recent census, which recorded a population of 3,879 in 2020.

3.8K
Total Population
4,539
Density (mi²)
-13 -0.34%
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)