Arahiwi is a rural area of New Zealand approximately 6 km west of Mamaku and 25 km from Rotorua.

[3] The Rotorua Branch is a disused railway line that ran through Arahiwi to connect Putāruru and Rotorua.

Ethnicities were 82.7% European/Pākehā, 25.0% Māori, 3.8% Pacific peoples, and 3.8% Asian.

The percentage of people born overseas was 15.4, compared with 27.1% nationally.

Although some people chose not to answer the census's question about religious affiliation, 59.6% had no religion, 28.8% were Christian, 1.9% had Māori religious beliefs and 1.9% had other religions.