Stephen Peter Clark Jr. (November 19, 1923 – June 4, 1996) was an American politician who served as Mayor of Metropolitan Dade County (now Miami-Dade County), Florida from 1970 to 1972 and from 1974 to April 1993, when a federal judge abolished the post.

He was also Mayor of Miami from 1967 to 1970 and from 1993 to his death from stomach cancer in 1996.

The Stephen P. Clark Government Center, the county hall of Miami-Dade County, is named in his honor.

He was the brother of Florida state senator Dick Clark.

Upon his death the Miami Herald lauded his political longevity to his penchant for inclusivity and fairness to all communities.