Cook married Hannah Curtis after the war and moved to New York, living in Clinton, Pompey, North Bergen, and finally settling in Clarendon, Orleans County, where he spent the last 36 years of his life.
His second wife was Ruth Cooper of Sweden, Monroe County, New York. He died May 20, 1866 at the age of 106. He had 10 children; eight of whom were named in his will: Miles Cook, Esther Coleman, Lemuel Cook, Worthy Cook, Lyman Cook, Electa Tousley, Curtis Cook, and Gilbert Cook.
Lemuel Cook served under Colonel Sheldon, in the 2nd Regiment Light Dragoons on the Continental Line. He fought at Brandywine and in the Virginian campaign, and was wounded several times. He applied for a pension in 1818 and was the last surviving pensioner of the Revolutionary War.
He was interviewed for a book The Last Men of the Revolution, published in 1864, in which his remembrances of the war were written down by Rev. E. B. Hilliard.