Nonni may refer to:
Nonni river, an alternate name for Nen River in Northeast China Nonni, nickname of Icelandic children's author Jón Sveinsson Nonni, Italian word meaning grandfathers or grandparents Ottaviano Nonni (1536-1606), Italian painter
See also Nonni and Manni, a 1988-1989 West German-Icelandic children's TV series