William Blount, 7th Baron Mountjoy, (c. 1561 – 1594) was an English peer.

William Blount was born circa 1561, the eldest son of James Blount, 6th Baron Mountjoy (c.1533-1582) and Catherine Leigh. He inherited his title on the death of his father. He never married On his death in 1594 in Hook, Dorset the title went into abeyance.