Harold Brown may refer to:

• Harold Brown (Tuskegee Airman) (1924–2023), U.S. Air Force officer and Tuskegee Airmen fighter pilot, World War II prisoner of war (POW)
• Harry Brown (journalist) (Harold Andrew Brown, 1930–2002), Canadian radio and television host
• Harold K. Brown (born 1934), San Diego civil rights activist
• Harold L. Brown (born 1946), Pennsylvania politician
• Harold P. Brown (1857–1932), American inventor, anti-alternating current activist
• Harold Brown (basketball) (1923–1980), American basketball player
• Harold Brown (Secretary of Defense) (1927–2019), American physicist, U.S. Secretary of Defense
• Harold Ray Brown (born 1946), American drummer, member of the 1970s band War
• Harold Brown (athlete) (1917–2002), Canadian athlete
• Harold Brown (footballer) (1878–1940), Australian rules footballer for Essendon and St Kilda
• Harold Brown (gymnast) (1904–1986), British Olympic gymnast
• Harold Brown (Rhode Island financier) (1863–1900), American financier, philanthropist, and prominent member of New York society
• Harold Brown (ice hockey) (1920–1997), Canadian ice hockey right winger
• Harold Brown (film preservationist) (1919–2008), British pioneer in the science of film preservation
• Harold Brown (Royal Navy officer) (1878–1968), English engineer with the Royal Navy
• Harold Brown, main character in Harry Brown
• J. Harold Brown (1902–1982), American composer
• Harold O. J. Brown (1933–2007), American theologian, professor, activist, and author
• Harold Vivian Marsh Brown (c. 1907–1992), Australian architect

• Harry Brown (disambiguation)
• Harold Browne (1811–1891), British bishop
• Harry Browne (1933–2006), American writer, politician, investment analyst, and Libertarian Party Presidential nominee