BAP Almirante Grau was a scout cruiser of the Peruvian Navy, the lead ship of its class. Along with its sister ship Coronel Bolognesi, Almirante Grau was one of Peru's two most powerful warships for the first half of the twentieth century. The ship was named for Miguel Grau Seminario, naval hero of the country.

The Almirante Grau class was a class of two scout cruisers built for the Peruvian Navy between 1905 and 1907. Both ships remained in service until 1958.