Lamar, Missouri

Lamar, Missouri
Location of Lamar, Missouri
Lamar
Location within Missouri
Lamar
Lamar (the United States)
Coordinates: 37°29′52″N 94°16′45″W / 37.49778°N 94.27917°W / 37.49778; -94.27917
CountryUnited States
StateMissouri
CountyBarton
Area
  Total
5.53 sq mi (14.32 km2)
  Land5.21 sq mi (13.51 km2)
  Water0.31 sq mi (0.81 km2)
Elevation
951 ft (290 m)
Population
 (2020)
  Total
4,266
  Density818.18/sq mi (315.88/km2)
Time zoneUTC-6 (Central (CST))
  Summer (DST)UTC-5 (CDT)
ZIP code
64759
Area code417
FIPS code29-40376
GNIS feature ID2395617
Websitecityoflamar.org

Lamar is a city in and the county seat of Barton County, Missouri, United States. As of the 2020 census, the city population was 4,266. It is known as the birthplace of Harry S. Truman, the 33rd president of the United States.

The Lamar city government is consolidated with Barton County’s City Township. Because the city governance and township governance have different roles, circa 2002 the U.S. Census Bureau counted them as separate governments for census purposes. In addition, the city of Lamar is surrounded by, but is not part of Barton County’s Lamar Township.