DeCoursey is both a surname and a given name. Notable people with the name include:
Surname:
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James H. DeCoursey Jr. (1932-2016), American politician
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Jillian DeCoursey (born 1984), American mixed martial artist
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Patricia DeCoursey
Patricia Jackson DeCoursey (December 28, 1932 – January 1, 2022) was an American biologist. A leading researcher in the field of chronobiology, her research focused on behavioral, physiological, and ecological aspects of mammalian circadian rhyth ...
(1932–2022), American biologist
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Pete DeCoursey
Peter L. DeCoursey (September 1, 1961 – January 1, 2014) was an American news reporter of political topics in Pennsylvania. He worked in or covered Pennsylvania politics for nearly three decades, serving most recently as bureau chief f ...
(1961–2014), American journalist
Given name:
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DeCoursey Fales (1888–1966), American bibliophile
{{given name, type=both