Kymantas is a Lithuanian-language surname. Notable people with this surname include:
Kazimiera Kymantaitė (1909–1999), Lithuanian actress and stage director Simonas Kymantas (born 1993), Lithuanian basketball player Sofija Kymantaitė-Čiurlionienė (1886–1958), Lithuanian writer, activist, literary and art critic, playwright, poet, and translator