New Castle Flag

New Castle

County:
Garfield County
County Seat:
No
Area (mi²):
2.496
State:
Colorado

New Castle is a town located in Garfield County, Colorado. New Castle has a 2026 population of 4,894. New Castle is currently growing at a rate of 0.41% annually but its population has decreased by -0.35% since the most recent census, which recorded a population of 4,911 in 2020.

4.9K
Total Population
1,961
Density (mi²)
20 0.41%
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)