Sir John Smith of Skilts (1616–1644) was an Englishman who supported the Royalist cause in the English Civil War.
He always had a strong disposition for a military life, and ventured to return home without leave, to urge his relatives to permit him to follow his bent.
He distinguished himself by several deeds of daring; but hearing of the Scottish disturbances, he resolved to return to England and offer his services to Charles I.
He was taken prisoner on 13 December by William Waller in Winchester Castle, and did not obtain his liberty till the September following.
On his release he proceeded to Oxford, and was made lieutenant-colonel of Lord Herbert of Raglan's regiment of horse.