Ralph Brooke (1553–1625) was an English Officer of Arms in the reigns of Elizabeth I and James I. He is known for his critiques of the work of other members of the College of Arms, most particularly in A Discoverie of Certaine Errours Published in Print in the Much Commended 'Britannia' 1594, which touched off a feud with its author, the revered antiquarian and herald William Camden.