Semmes is a town in western Mobile County, Alabama, in the Mobile metropolitan statistical area. Formerly an unincorporated community, voters in Semmes approved incorporation of a part of the community as the city of Semmes on August 17, 2010. After a statutory enumeration, or census, the town was officially declared incorporated on May 2, 2011, by Mobile County Probate Judge Don Davis. The statutory census indicated that the town has a population of 2,897 people.