Keaau is a very small coastal town (i.e. on the ocean, a bay, or inlet) located in the state of Hawaii. With a population of 1,195 people and three associated neighborhoods, Keaau is the 54th largest community in Hawaii.

Keaau is also nautical, which means that parts of it are somewhat historic and touch the ocean or tidal bodies of water, such as inlets and bays. Quite often, nautical areas such as these attract visitors and locals who come to enjoy the scenery and various waterfront activities.

Even though Keaau is a smaller town, it has many people who hop on public transportation – mostly the bus for their daily commute to work. Typically, these people are commuting to good jobs in the surrounding cities.

The education level of Keaau citizens, measured as those with bachelor's degrees or advanced degrees, is similar to the national average for all American cities and towns. 18.63% of adults 25 and older in Keaau have a college degree.

The per capita income in Keaau in 2022 was $28,355, which is lower middle income relative to Hawaii and the nation. This equates to an annual income of $113,420 for a family of four. However, Keaau contains both very wealthy and poor people as well.

Keaau is an extremely ethnically-diverse town. The people who call Keaau home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Keaau residents report their race to be Asian, followed by White. Important ancestries of people in Keaau include Portuguese, German, English, European, and Irish.

In addition, Keaau has a lot of people living here who were born outside of the US (30.54%).

The most common language spoken in Keaau is English. Other important languages spoken here include Pacific Island languages and Japanese.