Kaldor is a surname. Notable people with the surname include:
Amber Kaldor (born 1990), Australian acrobatic gymnastAvraham Kaldor, Israeli winner of the Netanya chess tournament in 1976Connie Kaldor (born 1953), Canadian folk singer and songwriterJohn Kaldor (born 1936), Australian art collector and philanthropistJohn Kaldor, a character in the 1996 novel Awake and Dreaming by Kit PearsonLee Kaldor, Democratic legislator in the North Dakota State HouseMary Kaldor (born 1946), British economics academicNicholas Kaldor (1908–1986), British economist