Sacramento is a home rule-class city in McLean County, Kentucky, in the United States. The population was 429 as of the 2020 census. It is in…Sacramento is a home rule-class city in McLean County, Kentucky, in the United States. The population was 429 as of the 2020 census. It is included in the Owensboro metropolitan area. The first community at the site was known as "Crossroads", but the post office established in 1852 was named "Social Hill". In 1854, George L. Helm platted the town and renamed it Sacramento. Local tradition holds the name was suggested by John Vickers, recently returned from the California Gold Rush. The city was incorporated on October 8, 1860, and the post office followed suit the next year.