James Buchanan (1791–1868) was the 15th president of the United States from 1857 to 1861.
James Buchanan may also refer to:
Politics James Buchanan of Drumpellier (1726–1786), British merchant, twice Lord Provost of Glasgow James M. Buchanan (diplomat) (1803–1876), American jurist and diplomat James Buchanan (New South Wales politician) (1827–1891), Australian politician and magistrate James Buchanan (New Jersey politician) (1839–1900), U.S. Representative from New Jersey James P. Buchanan (1867–1937), American congressman from Texas James Buchanan, British East Pakistani official, 1st head of the paramilitary Bangladesh Ansars James Buchanan (Florida politician) (born 1982), American politician, member of the Florida Legislature
Sport Jim Buchanan (baseball) (1876–1949), baseball player Jim Buchanan (footballer) (1898–?), Scottish professional footballer Jim Buchanan (long jumper) (1955–1977), Canadian Olympic athlete James Buchanan (New Zealand cricketer) (1856–1921), New Zealand cricketer James Buchanan (South African cricketer) (1908–1989), South African cricketer
Other James M. Buchanan (1919–2013), American Nobel laureate economist James Buchanan (minister) (1804–1870), Church of Scotland minister and theologian James Buchanan, 1st Baron Woolavington (1849–1935), Scottish businessman, philanthropist, and racehorse owner and breeder James Buchanan (teacher) (1849–1897), Scottish teacher and founder of St. Margaret's School, Edinburgh James Buchanan (1785–1857), Scottish philanthropist James S. Buchanan (1864–1930), American educator, fourth president of the University of Oklahoma Sir James Buchanan, 2nd Baronet (1840–1901), British Royal Navy officer Jim Buchanan (violinist), American violinist, member of David Grisman Quintet
See also James Buchanan Duke (1856–1925), American industrialist James Buchanan Eads (1820–1887), American engineer and inventor James Buchanan Macaulay (1793–1859), Canadian lawyer Bucky Barnes, Marvel Comics character whose full name is James Buchanan Barnes Bucky Barnes (Marvel Cinematic Universe), film and TV adaptation of Marvel Comics character, also with the full name of James Buchanan Barnes