
Lamar
- County:
- Johnson County
- County Seat:
- No
- Area (mi²):
- 4.616
- State:
- Arkansas
Lamar is a city located in Johnson County, Arkansas. Lamar has a 2025 population of 1,781. Lamar is currently growing at a rate of 0.74% annually and its population has increased by 3.79% since the most recent census, which recorded a population of 1,716 in 2020.
The average household income in Lamar is $62,058 with a poverty rate of 25.44%. The median age in Lamar is 34.5 years: 32.1 years for males, and 38.2 years for females.