Kal is both a given name and a surname. Notable people with the name include:
Given name:
Kal Daniels (born 1963), former Major League Baseball outfielder
Kal Mann (1917–2001), American lyricist
Kal Naismith (born 1992), Scottish footballer
Kal Penn (born 1977), American actor, producer and civil servant, best known for the TV series House and the Harold and Kumar films
Surname:
Jan Kal (born 1946), Dutch poet
Miraç Kal (born 1987), Turkish cyclist
Paulus Kal, 15th-century German fencing master
Paweł Kal (born 1989), Polish footballer
Fictional:
Kal-El, real identity of DC Comics superhero Superman