Ahuimanu is spread out beneath the steep windward pali (cliff face) of the Koolau mountain and separated by a low ridge from Heeia Kea. Thus, this area is mostly inland and not directly on Kaneohe Bay. However, one neighborhood spreads over the ridge and along Kamehameha Highway where there is private access to the bay shore. Proximity to the pali gives the place a generally wet climate. As of the 2010 Census, this largely residential area had a population of 8,810. A small commercial mall is located here across the highway from the Valley of the Temples Memorial Park, a large cemetery noted for its Byodo-In Temple.
The U.S. postal code for Ahuimanu is 96744.