Cochran is a city in Bleckley County, Georgia, United States. As of the 2020 census, the city had a population of 5,026. The city is the county seat of Bleckley County. Cochran is named for Judge Arthur E. Cochran and was incorporated on March 19, 1869. Judge Cochran was largely instrumental in developing this section of Georgia through his work as president of the Macon and Brunswick Railroad, now the Southern Railway. Once known as Dykesboro, Cochran was settled by B. B.