Hawaiian Acres is located on the eastern side of the island of Hawaii at 19°32′56″N 155°3′21″W / 19.54889°N 155.05583°W / 19.54889; -155.05583 (19.548868, -155.055861).

[3] It is bordered to the east by Ainaloa and Orchidlands Estates, to the north by Kurtistown, to the northwest by Mountain View, and to the west by Fern Acres.

According to the United States Census Bureau, the CDP has a total area of 19.4 square miles (50.3 km2), all of it land.

There were 843 housing units at an average density of 43.8 per square mile (16.9/km2).

30.5% of all households were made up of individuals, and 3.0% had someone living alone who was 65 years of age or older.