Gaiser is a surname. Notable people with the surname include:
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Fred Gaiser (1885–1918), American baseball player
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Fritz Gaiser (1907–?), German cross-country skier
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George Gaiser (born 1945), American football player
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Jens Gaiser
Jens Gaiser (born August 15, 1978 in Baiersbronn) is a German nordic combined skier who has competed since 1998. He won a silver medal at the 2006 Winter Olympics in Turin in the 4 x 5 km team event. Gaiser also finished 19th in the 7.5 ...
(born 1978), German nordic combined skier
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Marco Gaiser (born 1993), German footballer
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Megan Gaiser, American business executive
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