Longmont Flag

Longmont

County:
Boulder County
County Seat:
No
Area (mi²):
29.28
State:
Colorado

Longmont is a city located in Boulder County, Colorado. Longmont has a 2026 population of 99,818. Longmont is currently growing at a rate of 0.72% annually and its population has increased by 0.62% since the most recent census, which recorded a population of 99,206 in 2020.

99.8K
Total Population
3,409
Density (mi²)
713 0.72%
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)