John Cochran (September 1, 1730 – April 6, 1807) was the 4th Surgeon General of the Continental Army during the American Revolution.

Cochran was born in Sadsbury, Chester County, Pennsylvania, on September 1, 1730, the son of Irish immigrants.

He served as physician under Lieutenant-Colonel John Bradstreet during his march on Fort Frontenac in 1758.

Because of the infighting and other troubles of his three predecessors as surgeon general, he is considered by some military medical historians as the "best of the Revolutionary period chief physicians."

Together, Gertrude and John were the parents of:[3] He died on April 6, 1807, in Palatine, New York.