Fenian Raids Hamilton Dibble Jessup (May 2, 1806 – November 24, 1892) was a medical doctor, militiaman, and political figure in Canada West.

He studied medicine in Montreal and opened a practice in Prescott, Ontario.

Jessup first joined the Grenville Militia in 1829 as an Ensign eventually rising to Captain, and commanded the Prescott Volunteer Battalion at the Battle of the Windmill in 1838.

He raised and commanded the 1st Prescott Rifle Company in 1856 which later became the 56th Grenville Regiment of which was he Lieutenant-Colonel.

His older brother, Edward Jessup III, represented Grenville in the Legislative Assembly of Upper Canada.