Leni is both a given name and a surname. Notable people with the name include:
Given name Male and female: Leni Alexander (1924–2005), Chilean composer Leni Apisai (born 1996), New Zealand rugby union player Leni Björklund (born 1944), Swedish politician Leni Harper (born 1954), Scottish actress Leni Junker (1905–1997), German runner Leni Kokkes-Hanepen (born 1934), Dutch fencer Leni Klum (born 2005), German-American model Leni Larsen Kaurin (born 1981), Norwegian footballer Leni Lohmar (1914–2006), German swimmer Leni Lynn (1923–2010), American actress Leni Parker (born 1966), Canadian actress Leni Riefenstahl (1902–2003), German director Leni Robredo (born 1965), 14th Vice President of the Philippines Leni Schmidt (1906–1985), German athlete Leni Shida (born 1994), Ugandan sprinter Leni Sinclair (born 1940), American photographer Leni Stengel (1901–1982), American actress Leni Stern (born 1952), German musician Leni Yahil (1912–2007), Israeli historian Leni Zumas, American novelist Tamaseu Leni Warren, Samoan swimmer
Surname Nollen Cornelius Leni, Solomon Islander politician Paul Leni (1885–1929), German director
Fictional characters Leni Loud, a character in the American animated series The Loud House Leni McClearly, identical twin sister of Gina McClearly in the 2022 Netflix miniseries Echoes Leni, the nurse in Franz Kafka's novel The Trial