Knock three times
# Knock three times

Knock three times can refer to:

* "Knock Three Times", a 1970 song by Tony Orlando and Dawn
* Knock Three Times (album), a 1971 album by Billy "Crash" Craddock
* Knock Three Times, a 1917 novel by Marion St. John Webb
* Knock Three Times, a 1968 British television serial that featured Hattie Jacques
* A tap code or secret knock
