Say When may refer to:
Say When!!, a 1960s American gameshow Say When (film), an alternative title for the 2014 film Laggies Say When (musical), a 1934 musical by Ray Henderson "Say When" (Lonestar song), 1998 "Say When" (Diana Trask song), 1973 "Say When", a song by the Fray in their album The Fray, 2009 "Say When", a song by Lene Lovich in their album Stateless, 1978