Theodore is located in Mobile County, Alabama. It is a census-designated place and member of the Mobile metropolitan statistical area. The area was also known as Clements in 1900 before the name changed to Theodore. It pays tribute for William Theodore Hieronymous, a saw mill operator, and postmaster. Theodore first appeared on the 1890 census as a community. It was disappeared in the later surveys until 1980 when Theodore was recognized as a census-designated place. As of the 2010 census, Theodore had a total population of 6,130 people residing in the area. Theodore is elevated by 62 feet above sea level. It has Zip codes 36582, 36590, and 36619.