Hardin is a surname. Notable people with the surname include:
Charles Henry Hardin (1820–1892), co-founder of Beta Theta Pi fraternity
Clifford M. Hardin, U.S. Secretary of Agriculture
DeVon Hardin, American basketball player
Garrett Hardin (1915–2003), American ecologist
George A. Hardin (1832–1901), New York lawyer and politician
Glen Hardin, American musician/piano player
Glenn Hardin (1910–1975), American athlete
Jerry Hardin, American actor
Jim Hardin (1943–1991), American baseball player
John Hardin (1753–1792), Continental Army officer in the American Revolutionary War
John J. Hardin (1810–1847), U.S. Representative from Illinois
John Wesley Hardin (1853–1895), outlaw and gunfighter of the American Old West
Louis T. Hardin (1916–1999), American musician known as Moondog
Martin Davis Hardin (1837–1923), Union Army general in the American Civil War
Martin D. Hardin (1780–1823), U.S. Senator from Kentucky
Melora Hardin, American actress
Paul Hardin Jr. (1903–1996), bishop of The Methodist Church (USA)
Salvor Hardin, fictional character in Isaac Asimov's Foundation series
Terri Hardin, American puppeteer
Tim Hardin (1941–1980), American folk musician and composer
Ty Hardin, American actor
