John Calhoun may refer to:
- John C. Calhoun, 7th Vice President, U.S. Senator (South Carolina)
- John Calhoun (printer), printer from Watertown, NY, founder of the Chicago Democrat
- John Calhoun (software developer)
- John Calhoun (Illinois politician) (1806-1859), Illinois politician, Surveyor General and pro-slavery leader in the "Bleeding Kansas" era
- John B. Calhoun, psychologist noted for his 1947 Norway rat studies
- John Calhoun (Alberta politician), politician in Alberta, Canada
- John Calhoun Bell, U.S. Representative
- John Calhoun Johnson, lawyer and rancher
- John Calhoun Phillips, governor of Arizona
- John Calhoun Sheppard, governor of South Carolina
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