Erni is both a given name, often a short form of Ernest, and a surname. Notable people with the name include:
Given name or nickname Erni Arneson (1917–2006), Danish actress Erni Cabat (1914–1994), American artist Erni Gregorčič (born 1976), Slovenian powerlifter Erni Hiir (1900–1989), Estonian poet and translator Erni Krusten (1900–1984), Estonian writer Erni Maissen (born 1958), Swiss footballer Erni Mangold (1927–2026), Austrian actress and stage director born Erna Goldmann Erni Singerl, actress who played Erni Käslinger, one of the main characters of Heidi und Erni, a German 1990 television series
Surname Barbara Erni (1743–1785), Liechtenstein thief, the last person to be executed by Liechtenstein Hans Erni (1909–2015), Swiss graphic designer, painter, illustrator, engraver and sculptor Lorenz Erni (born 1950), Swiss lawyer
See also Ernie (disambiguation)