Demographics
Ōpaki statistical area covers 35.62 km2 (13.75 sq mi). It had an estimated population of 1,160 as of June 2025, with a population density of 33 people per km2.
Historical population| Year | | |
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| 2006 | 852 | — |
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| 2013 | 957 | +1.67% |
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| 2018 | 1,062 | +2.10% |
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| 2023 | 1,146 | +1.53% |
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The 2006 population is for a larger area of 36.04 km2.
Source: |
Opaki had a population of 1,146 in the 2023 New Zealand census, an increase of 84 people (7.9%) since the 2018 census, and an increase of 189 people (19.7%) since the 2013 census. There were 588 males, 549 females, and 6 people of other genders in 429 dwellings. 1.8% of people identified as LGBTIQ+. The median age was 50.3 years (compared with 38.1 years nationally). There were 204 people (17.8%) aged under 15 years, 138 (12.0%) aged 15 to 29, 507 (44.2%) aged 30 to 64, and 294 (25.7%) aged 65 or older.
People could identify as more than one ethnicity. The results were 95.5% European (Pākehā); 9.9% Māori; 1.3% Pasifika; 1.0% Asian; 0.8% Middle Eastern, Latin American and African New Zealanders (MELAA); and 3.1% other, which includes people giving their ethnicity as "New Zealander". English was spoken by 98.7%, Māori by 1.8%, Samoan by 0.5%, and other languages by 5.5%. No language could be spoken by 1.0% (e.g. too young to talk). New Zealand Sign Language was known by 0.8%. The percentage of people born overseas was 17.3, compared with 28.8% nationally.
Religious affiliations were 35.1% Christian, 0.3% Hindu, 0.3% Islam, 0.5% Buddhist, 0.3% New Age, and 0.8% other religions. People who answered that they had no religion were 54.5%, and 8.1% of people did not answer the census question.
Of those at least 15 years old, 234 (24.8%) people had a bachelor's or higher degree, 534 (56.7%) had a post-high school certificate or diploma, and 174 (18.5%) people exclusively held high school qualifications. The median income was $48,400, compared with $41,500 nationally. 168 people (17.8%) earned over $100,000 compared to 12.1% nationally. The employment status of those at least 15 was 471 (50.0%) full-time, 168 (17.8%) part-time, and 9 (1.0%) unemployed.
