Siluria is an unincorporated community located in Shelby County, Alabama in the Birmingham, Alabama, metropolitan area. It was the home of a large cotton mill and company-built mill village which began operations in 1896 and finally closed in 1979. The community has been annexed by the city of Alabaster. It's named for the Silurian geological period because of rocks found there. A post office was established in 1872, and remained in operation until it was discontinued in 1972.