Lamar
- County:
- Prowers County
- County Seat:
- Yes
- Area (mi²):
- 5.215
- State:
- Colorado
Lamar is a city located in Prowers County, Colorado. Lamar has a 2026 population of 7,641. It is also the county seat of Prowers County. Lamar is currently growing at a rate of 1.41% annually but its population has decreased by -0.8% since the most recent census, which recorded a population of 7,703 in 2020.