Trowbridge is a surname. Notable people with the surname include:
Alexander Buel Trowbridge (1929–2006), U.S. Secretary of Commerce under President Lyndon Johnson
Augustus Trowbridge (1870–1934), American physicist and professor
Bill Trowbridge (1930–2019), British physicist and engineer
Bob Trowbridge (1930–1980), American professional baseball player
Charles Trowbridge (1882–1967), American film actor
Charles Christopher Trowbridge (1800–1883), American explorer, politician, businessman and ethnographer of Native American cultures
Charles T. Trowbridge (1835–1907), American politician
Edmund Trowbridge (1709–1793), judge during the Boston Massacre trial
Elton Trowbridge (1904–1974), member of the Wyoming House of Representatives
Glenn E. Trowbridge (born 1943), American politician
John Trowbridge (physicist) (1843–1923), American physicist
John Todd Trowbridge (1780–1858), member of the Wisconsin Territorial Legislature
John Townsend Trowbridge (1827–1916), American author
Josiah Trowbridge (1785–1862), American politician
N. C. Trowbridge (1815–1879), American slave trader
Peter Trowbridge, American landscape architect
Richard Trowbridge (1920–2003), Royal Navy rear-admiral and Governor of Western Australia
Rowland E. Trowbridge (1821–1881), American politician
Samuel Beck Parkman Trowbridge (1862–1925), partner in Trowbridge & Livingston architectural practice
Stephen V. R. Trowbridge (Michigan Attorney General) (1855–1891), American lawyer and politician
Stephen V. R. Trowbridge (Michigan legislator) (1794–1859), American politician
Thomas E. Trowbridge (1930–2009), member of both houses of the Wyoming State Legislature
William P. Trowbridge (1828–1892), American mechanical engineer, military officer and naturalist