Hamnes is a Norwegian surname. Notable people with the surname include:
Aasta Hansteen (1824–1908), Norwegian painter, writer, and early feminist Agathon Bartholomæus Hansteen (1812–1895), Norwegian priest and politician Christopher Hansteen (1784–1873), Norwegian astronomer and physicist Christopher Hansteen (1822–1912), Norwegian judge Conradine Birgitte Hansteen (1780–1866), Norwegian socialite and writer Geir Hansteen Jörgensen, Swedish Film-director Kirsten Hansteen (1903–1974), Norwegian editor and librarian Nils Hansteen (1855–1912), Norwegian painter Viggo Hansteen (1900–1941), Norwegian lawyer Viggo Hansteen (ship) Wilhelm von Tangen Hansteen (1896–1980), Norwegian military officer Waldemar Hansteen (1857–1921), Norwegian architect