Elna is a feminine given name. Notable people with the name include:
Elna Baker (born 1982), American writer and performer of humorous stories Elna Borch (1869–1950), Danish sculptor Elna Henrikson, Swedish figure skater Elna Jane Hilliard Grahn (1913–2006), American soldier Elna Kiljander (1889–1970), Finnish architect Elna Kimmestad (1918–1997), Norwegian actress Elna Lassen (1901–1930), Danish ballerina Elna Lillback (1906–1950), American dancer Elna Møller (1913–1994), Danish architect Elna Montgomery (1885–1981), Swedish figure skater Elna Munch (1871–1945), Danish feminist and politician Elna Reinach (1968), South African former pro tennis player