Thad is a masculine given name, often a short form (hypocorism) of Thaddeus. It may refer to:
William Thad Cochran (born 1937), United States Senator for Mississippi
Thaddeus Thad Jones (1923–1986), American jazz trumpeter and bandleader
Thaddeus Thad Lewis (born 1987), an American football quarterback for the Houston Texans.
Thaddeus Thad Luckinbill, American actor on the soap opera The Young and the Restless
Thad Matta (born 1967), American longtime Ohio State University men's basketball head coach