Jill is a female given name, of Latin origin, meaning sweetheart or youthful. Used as a short form of the female given name Gillian, now it is often used as an independent name. Jill may refer to:

In people:

• Jill Wagner, American actress
• Jill St. John, an American actress
• Jill Dando, a British television presenter, murdered in April 1999.
• Jill Johnson, a Swedish country and schlager singer.
• Jill Vidal, a pop singer from Hong Kong
• Jill Carroll, an American journalist held in Iraq

In fictional characters:

• Jill, a character in the nursey rhyme Jack and Jill
• Jill Johnson, a character from When a Stranger Calls
• Jill Valentine, a Resident Evil character
• Jill, the main character from the video game Drill Dozer.
• Jill, the main character of Cake Mania
• Jill Marin, the rookie agent in The Sentinel (2006 film)
• Jill Pole, a main character in C.S. Lewis' The Chronicles of Narnia: The Silver Chair

In other:

• Jill (cat), a cat on Blue Peter.
• Nakajima B6N, Japanese torpedo bomber of World War II
• Jill of the Jungle, a computer game
• A generic representative of the female sex, as in jillstrap (also shortened simply to jill)
• Jill, a novel by Philip Larkin
• A female ferret
• The Buffalo Jills, the Bills cheerleading squad
• Jill, one of a pair of windmills at Clayton, Sussex.