Phineas Lyman (1716–1774) was a colonial American soldier known for his service in the provincial British Army of the French and Indian War.
He graduated at Yale in 1738, was a tutor there until 1741, studied law and began practice at Suffield (which was then within the boundaries of Massachusetts).
In March, 1755 he was appointed a major general and was made commander in chief of the Connecticut militia force of 1000 men, which participated in the unsuccessful expedition against Crown Point.
At the Battle of Lake George (8 September 1755), after Sir William Johnson suffered a slight wound, Lyman took command of the forces and repulsed the attack of the French and Indians.
The following year he was with Lord Amherst at the capture of Crown Point and Ticonderoga and in 1760 took part in the expeditions to Oswego and Montreal.