Lamar is located in Johnson County. About 1,719 people live here (as of 2020). Between 2010 and 2020, the population grew from 1,605 to 1,719. The region is at 134 meters above sea level. The area covers about 12.3 square kilometers. There are about 110 streets in Lamar. The postal codes are 72846. The dialing code is 479. Lamar is city in Johnson County, Arkansas, United States. Among other things, Lamar has schools.
| Area | 12.3 km² |
| Elevation | 134 m |
| Located in | Johnson County |
| Postal code | 72846 |
| Country | United States |
| Population | 1719 |
| Official name | Lamar |
| Bike path |
| Bike lane on roadway |
| Cycling allowed on bus lane |
| Bicycle street |
| Open to cyclists |
| Open to cyclists, good path |
| Cycling prohibited |
| Cobblestone |
| Long-distance bike route | (depending on scale) |
| Long-distance bike route |
| Long-distance hiking trail | (depending on scale) |
| Long-distance hiking trail |
| Pedestrians prohibited |