John Ainsworth may refer to:
John Ainsworth (by 1523-58/59), MP for Worcester John Ainsworth (Wisconsin politician) (born 1940), American politician Sir John Ainsworth, 1st Baronet (1844–1923), English industrialist, banker and Liberal politician John C. Ainsworth (1822–1893), American pioneer businessman and steamboat owner in Oregon Sir John Ainsworth, 3rd Baronet (1912–1981), see the Ainsworth baronets John Ainsworth (pilot), co-pilot of Jim Wallwork and one of the first Allied troops into France during the D-Day invasion John Ainsworth (producer), writer, director, executive, and producer for Big Finish Productions John Edgar Ainsworth (1920–2004), American polymath and NASA physicist John Dawson Ainsworth (1864–1946), British administrator in East Africa
See also John Ainsworth-Davis (1895–1976), Welsh athlete and gold medalist at the 1920 Summer Olympics