Papaikou (Hawaiian: Pāpaʻikou) is a census-designated place (CDP) in Hawaii County, Hawaii, United States, and is a few miles north of the county seat, Hilo.

Papaikou is located on the east side of the island of Hawaii at 19°47′38″N 155°5′48″W / 19.79389°N 155.09667°W / 19.79389; -155.09667 (19.794022, -155.096531).

Papaikou has a tropical rainforest climate (Af) with heavy rainfall year-round.

There were 502 housing units at an average density of 342.4 per square mile (132.2/km2).

Media related to Papaikou, Hawaii at Wikimedia Commons