Colonel John Hart (July 8, 1706 – October 30, 1777) was a militia officer during King George's War and the French and Indian War from the Province of New Hampshire.

He was married three times, to Mary Dennett, Abigal Landale and Sara Savill.

Hart served in the New Hampshire Militia during the capture of Fortress Louisbourg from the French in 1745 by a force made up of militia from the New England colonies supported by the Royal Navy and commanded by William Pepperrell.

During the French and Indian War, Hart was promoted to colonel[1] and commanded a battalion of the New Hampshire Provincial Regiment[2] that was with General Jeffery Amhearst that again captured Fortress Louisbourg in 1758.

[4] Hart died aged 71, at his house in Portsmouth, New Hampshire.