Johnstown Flag

Johnstown

County:
Weld County
County Seat:
No
Area (mi²):
15.437
State:
Colorado

Johnstown is a town located in Weld County, Colorado. Johnstown has a 2026 population of 20,639. Johnstown is currently growing at a rate of 5.77% annually and its population has increased by 18.84% since the most recent census, which recorded a population of 17,367 in 2020.

20.6K
Total Population
1,337
Density (mi²)
1.1K 5.77%
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)