Lamar County, Georgia

Lamar County is a county located in the west central portion of the U.S. state of Georgia. As of the 2020 census, the population was 18,500. The county seat is Barnesville.

History
The Georgia General Assembly proposed the constitutional amendment to create the county on August 17, 1920, and the citizens of the state voted in favor of the amendment on November 2, 1920. Land from Pike County and Monroe County was then transferred to create Lamar County. Lamar County was named after Confederate Democrat Lucius Quintus Cincinnatus Lamar II.

Geography
According to the U.S. Census Bureau, the county has a total area of 186 sqmi, of which 184 sqmi is land and 2.3 sqmi (1.3%) is water. It is located in the Piedmont region of the state.

The western third of Lamar County, west of a line from Orchard Hill through Milner and Barnesville, is located in the Upper Flint River sub-basin of the ACF River Basin (Apalachicola-Chattahoochee-Flint River Basin). The eastern majority of the county is located in the Upper Ocmulgee River sub-basin of the Altamaha River basin.

Major highways

 * I-75.svg Interstate 75
 * US 41.svg U.S. Route 41
 * US 341.svg U.S. Route 341
 * Georgia 7.svg State Route 7
 * Georgia 18.svg State Route 18
 * Georgia 36.svg State Route 36
 * Georgia 109.svg State Route 109
 * Georgia 401.svg State Route 401 (unsigned designation for I-75)

Adjacent counties

 * Butts County (northeast)
 * Monroe County (east)
 * Upson County (southwest)
 * Pike County (west)
 * Spalding County (northwest)

Cities

 * Barnesville (county seat)
 * Milner

Town

 * Aldora
 * Goggins

Demographics
As of the 2020 United States census, there were 18,500 people, 6,494 households, and 3,746 families residing in the county.