Knave
Knave may refer to:
- A rogue (vagrant), a rascal, deceitful fellow, a dishonest man
 - Knave (playing card), another name for the jack in card games
 - Knave (British magazine), a British softcore pornographic magazine published 1968–2015
 - Knave (American magazine), a short-lived American men's magazine published in 1959
 - The Knave, the codename of Arlecchino, a character in 2020 video game Genshin Impact
 - The Knave, a Welsh hillfort also known as Deborah's Hole Camp
 - In Knights and Knaves logic puzzles, a person who always lies
 - A male domestic worker, a person who works within the employer's household (kitchen boy in Middle English)