Geh is a surname. It can be a German surname related to the French Gay, or a romanization of the Chinese surname Ni (), commonly used in Malaysia and Singapore.

Notable people with the surname include: Bonifasius Belawan Geh (born 1962), Indonesian politician and regent of Mahakam Ulu Geh Min (born 1950), Singaporean ophthalmologist and former Nominated Member of Parliament Selvanus Geh (born 1993), Indonesian badminton player Sue Geh (1959–1998), Australian basketball player

See also GEH (disambiguation)