Lamar is a city in and the county seat of Barton County, Missouri, United States. Landmarks include Harry S Truman Birthplace State Historic Site and Lamar Municipal Airport. Lamar is the birthplace of Neva Abelson, physician.
- CountyBarton County
- Population4,266 (2020 U.S. Census)
- Named forMirabeau B. Lamar
- Historic places1 on the National Register




























Harry S Truman Birthplace State Historic Site
A view of Lamar
A view of Lamar