Zahir is an Arabic surname. Notable people with the surname include:

• Abdul Zahir (Afghan Prime Minister) (1910–1983), former prime minister of Afghanistan
• Abdul Zahir (Guantanamo Bay detainee 753) (born 1972), Guantanamo Bay detainee
• Ahmad Zahir (1946–1979), Singer from Afghanistan
• Mohommad Zahir (born 1953), Guantanamo Bay detainee
• Mohamed Zahir (born c. 1950), Chief of Staff of the Republic of Maldives National Defence Force

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