Clay is a city in Jefferson County, Alabama. It is to the northeastern part of the county, and was a CDP till mid-2000. It is part of the Birmingham–Hoover–Cullman Combined Statistical Area. It has a total area of 10.3 square miles, most of which is land.
Construction, manufacturing and retail trade are the major economic activities locally. The closest hospital is St. Vincent's East, located in Birmingham, about 7 miles away. Clay's cost of living is 4.80% lower than the country average.