Clay is a city in northeastern Jefferson County, Alabama, United States. It is part of the Birmingham–Hoover–Cullman Combined Statistical Area in the north-central part of the state. Local government is run by a mayor and city council.
Before incorporation on June 6, 2000, it was a census-designated place (CDP). The population nearly doubled in the next decade, reaching 9,708 at the 2010 census, as it has attracted commuters to jobs in the urban areas.
The oldest church in Jefferson County, Mount Calvary Presbyterian Church, is located in Clay. The congregation has been meeting continually since 1806, when it was established by early Scots-American settlers.
On January 23, 2012, a total of 231 homes and businesses were either damaged or destroyed when an EF3 tornado passed through several subdivisions. Damage was heavy in downtown Center Point. Some of the homes were flattened. Trees were snapped and uprooted along the path and the Center Point Elementary School was damaged. A sixteen-year-old student from Jefferson County International Baccalaureate School died before reaching cover during the tornado.