Tennfjord is a Norwegian surname. Notable people with the surname include:
(born 1963), Norwegian local politician (born 1977), Norwegian journalist, sommelier, and wine connoisseur Kjell Tennfjord (born 1953), Norwegian siviløkonom and entrepreneur Margrethe Tennfjord (1935–2024), Norwegian politician (born 1941), Norwegian teacher and singer (1911–2004), Norwegian musician and conductor