John Ainsworth

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