Vaher is an Estonian surname (meaning "maple"). Notable people with the surname include:
Andreas Vaher (born 2004), Estonian footballer Anette Vaher (born 2007), Estonian rhythmic gymnast Ken-Marti Vaher (born 1974), Estonian politician Lembi Vaher (born 1987), Estonian pole vaulter Maret Vaher (born 1973), Estonian orienteer Reelika Vaher (born 1978), Estonian footballer