James Mann is the name of:

• James Mann (1822–1868), American legislator from Maine and U.S. Representative for Louisiana
• James Mann (Australian politician) (1892–1965), Australian state politician in Western Australia
• James Mann (South Carolina politician) (1920–2010), American soldier, lawyer and U.S. Representative from South Carolina
• James Mann, 5th Earl Cornwallis (1778–1852), British peer and Tory politician
• James Robert Mann (Illinois politician) (1856–1922), American legislator and U.S. Representative from Illinois

• James Mann (cricketer) (1903–1984), Australian cricketer
• James Mann (curator) (1897–1962), British collector, surveyor and historian of art
• James Mann (writer) (born 1946), American writer

• Jim Mann (baseball) (born 1974), American baseball player
• Jimmy Mann (disambiguation)
• James Man (1755–1823), businessman
• Mann (surname)