James Duncan
James, Jim, or Jimmy Duncan may refer to:
Politicians
- James Duncan (Pennsylvania politician), American politician from Pennsylvania
- James Duncan (MP for Barrow-in-Furness), British lawyer and Liberal politician
- James H. Duncan, American politician from Massachusetts
- James Hastings Duncan, British Liberal Member of Parliament for Otley, 1900–1918
- Jim Duncan (Alaska politician), former Speaker of the Alaska House of Representatives, congressional candidate
- Jimmy Duncan (politician), American politician from Tennessee
- Sir James Duncan, 1st Baronet, British politician
Sportspeople
- James Duncan (discus thrower), American athlete
- James Duncan (football left-back), Scottish footballer
- James Duncan (football outside left), Scottish footballer
- James Duncan (basketball), basketball coach
- Jamie Duncan, American football linebacker
- Jim Duncan (baseball), American catcher and first baseman in Major League Baseball
- Jim Duncan (cornerback), American football player
- Jim Duncan (defensive end), American football player and coach
- Jim Duncan (footballer), English professional footballer
- Jimmy Duncan (footballer, born 1930), Scottish footballer
- Jimmy Duncan (rugby union), New Zealand rugby union footballer, coach and referee
Others
- James Duncan (art collector), Scottish sugar refiner and philanthropist
- James Duncan (bishop), Episcopal bishop in America
- James Duncan (missionary), New Zealand missionary and Presbyterian minister
- James Duncan (musician), Canadian-born musician, improviser and house music producer
- James Duncan (surgeon), Scottish surgeon and main manufacturer of chloroform in 19th century Britain
- James Duncan (union leader), Scottish-American union leader
- James Duncan (United States Army officer), American artillery officer of the Mexican–American War
- James Duncan (zoologist), Scottish naturalist
- Jimmy Duncan (songwriter), American songwriter
- James Elmslie Duncan, English Chartist poet, editor, writer, and activist
- James K. L. Duncan, American soldier and Medal of Honor recipient
- James Matthews Duncan, Scottish physician
- James Duncan (tailor), Scottish tailor and landowner