Harnden is a surname. Notable people with the surname include:
Arthur Harnden (1924–2016), American sprinter E. J. Harnden (born 1983), Canadian curler Henry Harnden (1823–1900), Union Army general Iain Harnden (born 1976), Zimbabwean hurdler Ken Harnden (born 1973), Zimbabwean hurdler Ryan Harnden (born 1986), Canadian curler Toby Harnden (born 1966), English journalist and writer William F. Harnden (1812–1845), American businessman
See also Harnden Tavern, historic tavern in Wilmington, Massachusetts Harnden Farm, historic farmhouse in Andover, Massachusetts