Rainbows End is a rural settlement at the end of Green Road between the Oak River and Matakana River in Auckland Region. Matakana is 4.5 km (2.8 mi) to the north. Sandspit is across the Oak River directly south.^[3]

Rainbows End Reserve is a small waterfront park with a boat ramp and jetty.^[4][5]

Statistics New Zealand describes Rainbows End as a rural settlement, which covers 0.22 km² (0.085 sq mi)^[1] and had an estimated population of 100 as of June 2023,^[2] with a population density of 455 people per km². Rainbows End is part of the larger Dome Valley-Matakana statistical area.^[6]

Rainbows End had a population of 111 at the 2018 New Zealand census, an increase of 30 people (37.0%) since the 2013 census, and an increase of 30 people (37.0%) since the 2006 census. There were 51 households, comprising 54 males and 57 females, giving a sex ratio of 0.95 males per female. The median age was 62.1 years (compared with 37.4 years nationally), with 6 people (5.4%) aged under 15 years, 9 (8.1%) aged 15 to 29, 42 (37.8%) aged 30 to 64, and 54 (48.6%) aged 65 or older.

Ethnicities were 97.3% European/Pākehā, 2.7% Māori, 2.7% Pacific peoples, 2.7% Asian, and 0.0% other ethnicities. People may identify with more than one ethnicity.

Religions were 51.4% irreligious, 37.8% Christian, and 2.7% Muslim. The remaining 8.1% chose not to answer the question.

Of those at least 15 years old, 27 (25.7%) people had a bachelor's or higher degree, and 15 (14.3%) people had no formal qualifications. The median income was $31,700, compared with $31,800 nationally. 21 people (20.0%) earned over $70,000 compared to 17.2% nationally. The employment status of those at least 15 was that 33 (31.4%) people were employed full-time, 15 (14.3%) were part-time, and 3 (2.9%) were unemployed.^[7]