Walter Hart (or Walter Lyhert; died 24 May 1472) was a medieval Bishop of Norwich. He was Provost of Oriel College, Oxford, from 1435 to 1446. He was nominated as bishop on 24 January 1446 and was consecrated on 27 February 1446. He died on 24 May 1472.
The executors of his will are named as William Pykenham, archdeacon of Suffolk, John Bulman, Robert Hober, Henry Smyth, and another (illegible).