Alabaster is a city and southern suburb of Birmingham in Shelby County, Alabama, United States. At the 2020 census, the population was 33,284. Alabaster is the 16th largest city in Alabama by number of residents.

Shelby County is located in the central portion of the U.S. state of Alabama. As of the 2020 census the population was 223,024, making it the sixth-most populous county in Alabama. The county seat is Columbiana. Its largest city is Alabaster. The county is named in honor of Isaac Shelby, Governor of Kentucky from 1792 to 1796 and again from 1812 to 1816. Shelby County is included in the Birmingham–Hoover, AL Metropolitan Statistical Area.