Lenny or Lennie is a given name, often a nickname for Leonard, and may refer to:

People

Leonard Lenny Dykstra (born 1963), American former Major League Baseball player
Lenny Fernandes Coelho (born 1988), Brazilian footballer
Leonard Lennie Friedman (born 1976), American former National Football League player
Lenny Hayes (born 1980), former Australian rules footballer
Leonid Lenny Krayzelburg (born 1975), Ukrainian-born American swimmer, four-time Olympic gold medalist
Jan Leonardus Lennie Louw (born 1959), South African-born Namibian cricketer
Lenny Permana (born 1975), female badminton player from Australia
Lenny Rodrigues, Indian footballer playing for FC Goa
Lennie Rosenbluth (1933–2022), American former college basketball and National Basketball Association player
Lenny Wilkens (born 1937), American former National Basketball Association player and coach, member of several Halls of Fame as player and coach
Lennie Waite (born 1986), British female track and field athlete

Lenny Fontana (active from 1985), American house music DJ
Lennie Hayton (1908-1971), American composer and conductor
Lenny Kaye (born 1946), American musician, composer and writer, guitarist of Patti Smith Group
Leonard Lenny Kravitz (born 1964), American rock/hard rock singer, songwriter, producer and guitarist
Lenny Waronker (born 1941), American record label executive and producer

Lenny Clarke (born 1953), actor, writer, and producer
Lenny Henry (born 1958), British stand-up comedian, actor, writer and television presenter
Lennie James (born 1965), British actor
Leonard Alfred Schneider Lenny Bruce (1925-1966),an American stand-up comedian, social critic, and satirist

Leonard DiMaria (born 1941), New York mobster
Hugh Leonard Lenny Murphy (1952-1982), psychopathic killer from Northern Ireland, member of the paramilitary Ulster Volunteer Force
Lenny Montana (1926–1992), professional wrestler and mob enforcer turned film actor

Fictional characters

Lenny (bot), a chat bot designed to disrupt telemarketer calls
Lennie Small, principal character in the John Steinbeck novel, Of Mice and Men
Lenny Kosnowski, in the television series, Laverne and Shirley
Lenny Leonard, a recurring character in the television series, The Simpsons
Lenny, in the animated film, Toy Story
Lenny Feder, in the films Grown Ups and Grown Ups 2
Lenny Parker, in the television series, Mona the Vampire
Lenny, in the animated film, Shark Tale
Lenny, a neopet
Leni Loud, in the animated series, The Loud House
Lennie Briscoe, on the television series, Law and Order
Lenny Summers, in the video game Red Dead Redemption 2
Lenny, a recurring character in Fanboy and Chum Chum
Lenny, a gorilla from Jim Henson's Animal Show