Dam is a Danish and Faroese surname. It is a toponymic surname and means 'pond' in Danish. Notable people with the surname include:
Atli Dam (1932–2005), Prime Minister of the Faroe Islands Henrik Dam (1895–1976), Danish biochemist, Nobel Prize winner Jan Dam (footballer) (born 1968), Faroese footballer Jan Dam (boxer) (1905–1985), Belgian boxer Kenneth W. Dam (1932–2022), American lawyer and politician Peter Mohr Dam (1898–1968), Prime Minister of the Faroe Islands Rigmor Dam (born 1971), Faroese politician Thomas Dam (1909–1986), inventor of the troll doll
See also Dams (surname), northern-European surname van Dam, Dutch surname van Damm, Dutch surname van Damme (disambiguation), Dutch surname