Martinez is an unincorporated community and census-designated place (CDP) in Columbia County, Georgia, United States. It is a northwestern suburb of Augusta and is part of the Augusta, Georgia metropolitan area. The population was 34,535 at the 2020 census.

Columbia County is a county located in the east central portion of the U.S. state of Georgia. As of the 2020 census, the population was 156,010. The legal county seat is Appling, but the de facto seat of county government is Evans.