Lamar County is a county located in the U.S. state of Georgia. As of the 2010 census, the population was 18,317. The county seat is Barnesville.
Lamar County is included in the Atlanta-Sandy Springs-Roswell, GA Metropolitan Statistical Area.
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 Lucius Quintus Cincinnatus Lamar II.
According to the U.S. Census Bureau, the county has a total area of 186 square miles (480 km2), of which 184 square miles (480 km2) is land and 2.3 square miles (6.0 km2) (1.3%) is water.
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.
Lamar County is the name of several counties in the United States:
Lamar County is a county located in the U.S. state of Texas. As of the 2010 census, its population was 49,793. Its county seat is Paris. The county was formed by the Congress of the Republic of Texas on December 17, 1840 and organized the next year. It is named for Mirabeau Buonaparte Lamar, the second president of Texas.
Lamar County comprises the Paris, TX Micropolitan Statistical Area.
Lamar County, once heavily Democratic, is now represented in the Texas House of Representatives by the Republican Erwin Cain of Sulphur Springs, Texas. Republican Representative Marsha Farney, reared in Lamar County, represents District 20, which includes the northern portion of Williamson County in the Austin suburbs.
According to the U.S. Census Bureau, the county has a total area of 933 square miles (2,420 km2), of which 907 square miles (2,350 km2) is land and 926 square miles (2,400 km2) (2.8%) is water.