Muldowney is an Irish surname. Notable people with the surname include:
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Aly Muldowney (born 1983), English rugby player
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Brendan Muldowney, graduate of Dun Laoghaire Institute of Art and Design, Ireland (The National Film School)
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Dominic Muldowney (born 1952), British composer
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Joey Muldowney (born 2004), American ice hockey player
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Luke Muldowney (born 1986), English footballer
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Michael Joseph Muldowney (1889–1947), Republican member of the U.S. House of Representatives from Pennsylvania
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Shirley Muldowney (born 1940), pioneer in professional auto racing
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Suzanne Muldowney (born 1952), performance artist best known for her appearances on The Howard Stern Show
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Sylvester Muldowney (1908–1995), Irish hurler
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Therese Muldowney (born 1987), camogie player and social worker, who played in the 2009 All Ireland camogie final
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