Celebrities with first name: Clay

Clayton Holmes Aiken (né Grissom; born November 30, 1978) is an American singer, television personality, actor, political candidate, and activist. Aiken finished second place on the second season of American Idol in 2003, and his debut album, Measure of a Man, went multi-platinum. He released four more albums on the RCA label, Merry Christmas with Love (2004), A Thousand Different Ways (2006), the Christmas EP All is Well (2006), and On My Way Here (2008). Since then he has released two more albums, both with Decca Records: Tried and True (2010) and Steadfast (2012). Aiken has also had eleven tours in support of his albums. In all, he has sold over 5 million albums, and is the fourth-highest-selling American Idol alumnus.

Herbert Claiborne Pell IV (born November 17, 1981) is an American lawyer, military officer, and politician. He is a commander and judge advocate in the United States Coast Guard Reserve, and served as the Deputy Assistant Secretary for International and Foreign Language Education in the United States Department of Education. He is the grandson of the late Senator Claiborne Pell. Pell ran an unsuccessful campaign for the 2014 Democratic Party nomination for Governor of Rhode Island, which he lost to Rhode Island State Treasurer Gina Raimondo.

Clay Daniel Buchholz (born August 14, 1984) is an American professional baseball pitcher who is a free agent. He has played in Major League Baseball (MLB) for the Boston Red Sox, Philadelphia Phillies, Arizona Diamondbacks, and Toronto Blue Jays. Buchholz made his MLB debut with the Red Sox in 2007. In his second major league start, he pitched a no-hitter, becoming the third MLB pitcher since 1900 to throw a no-hitter in his first or second start and the first Red Sox rookie to throw one. He is a two-time MLB All-Star.

Clay Greenbush (born 1968) is an American actor and former child actor.

Clay Schuette Felker (October 2, 1925 – July 1, 2008) was an American magazine editor and journalist who co-founded New York Magazine in 1968. He was known for bringing large numbers of journalists into the profession. The New York Times wrote in 1995, "Few journalists have left a more enduring imprint on late 20th-century journalism—an imprint that was unabashedly mimicked even as it was being mocked—than Clay Felker."