Waitoki is a locality in the Rodney District of New Zealand. Wainui is approximately 5.5 kilometres to the north-east, Kaukapakapa 6.5 km to the north-west, and Dairy Flat 10 km to the south-east. The Wainui Stream joins the Waitoki Stream just to the north-east of the locality. The stream flows west into the Kaukapakapa River.

Waitoki is centred on an SA1 statistical area which covers 1.80 km (0.69 sq mi). The SA1 area is part of the larger Waitoki statistical area.

Historical population for Waitoki settlement

Year	Pop.	±% p.a.
2013	180	—
2018	183	+0.33%
2023	216	+3.37%
Source:

The SA1 area had a population of 216 in the 2023 New Zealand census, an increase of 33 people (18.0%) since the 2018 census, and an increase of 36 people (20.0%) since the 2013 census. There were 117 males and 96 females in 72 dwellings. 1.4% of people identified as LGBTIQ+. The median age was 37.0 years (compared with 38.1 years nationally). There were 51 people (23.6%) aged under 15 years, 33 (15.3%) aged 15 to 29, 108 (50.0%) aged 30 to 64, and 24 (11.1%) aged 65 or older.

People could identify as more than one ethnicity. The results were 94.4% European (Pākehā), 4.2% Māori, 1.4% Pasifika, and 5.6% Asian. English was spoken by 95.8%, and other languages by 5.6%. No language could be spoken by 2.8% (e.g. too young to talk). The percentage of people born overseas was 20.8, compared with 28.8% nationally.

Religious affiliations were 25.0% Christian, and 1.4% other religions. People who answered that they had no religion were 66.7%, and 5.6% of people did not answer the census question.

Of those at least 15 years old, 24 (14.5%) people had a bachelor's or higher degree, 96 (58.2%) had a post-high school certificate or diploma, and 33 (20.0%) people exclusively held high school qualifications. The median income was $51,500, compared with $41,500 nationally. 30 people (18.2%) earned over $100,000 compared to 12.1% nationally. The employment status of those at least 15 was that 99 (60.0%) people were employed full-time and 30 (18.2%) were part-time.

Waitoki statistical area covers 40.75 km (15.73 sq mi) south and east of the settlement and had an estimated population of 1,740 as of June 2024, with a population density of 43 people per km.

Historical population for the statistical area

Year	Pop.	±% p.a.
2006	1,278	—
2013	1,320	+0.46%
2018	1,530	+3.00%
2023	1,698	+2.11%
Source:

Waitoki statistical area had a population of 1,698 in the 2023 New Zealand census, an increase of 168 people (11.0%) since the 2018 census, and an increase of 378 people (28.6%) since the 2013 census. There were 864 males, 828 females and 3 people of other genders in 537 dwellings. 2.3% of people identified as LGBTIQ+. The median age was 42.3 years (compared with 38.1 years nationally). There were 318 people (18.7%) aged under 15 years, 300 (17.7%) aged 15 to 29, 846 (49.8%) aged 30 to 64, and 234 (13.8%) aged 65 or older.

People could identify as more than one ethnicity. The results were 92.0% European (Pākehā); 7.1% Māori; 1.6% Pasifika; 5.5% Asian; 0.7% Middle Eastern, Latin American and African New Zealanders (MELAA); and 2.3% other, which includes people giving their ethnicity as "New Zealander". English was spoken by 97.9%, Māori language by 1.2%, Samoan by 0.2%, and other languages by 9.0%. No language could be spoken by 1.6% (e.g. too young to talk). New Zealand Sign Language was known by 0.2%. The percentage of people born overseas was 25.4, compared with 28.8% nationally.

Religious affiliations were 26.9% Christian, 0.2% Hindu, 0.4% Māori religious beliefs, 0.4% Buddhist, 0.5% New Age, and 1.4% other religions. People who answered that they had no religion were 63.1%, and 7.1% of people did not answer the census question.

Of those at least 15 years old, 273 (19.8%) people had a bachelor's or higher degree, 756 (54.8%) had a post-high school certificate or diploma, and 246 (17.8%) people exclusively held high school qualifications. The median income was $52,100, compared with $41,500 nationally. 297 people (21.5%) earned over $100,000 compared to 12.1% nationally. The employment status of those at least 15 was that 792 (57.4%) people were employed full-time, 237 (17.2%) were part-time, and 27 (2.0%) were unemployed.

Waitoki School is a coeducational full primary (years 1-8) school with a roll of 175 students as of November 2024. The school opened in 1924 and celebrated its 75th anniversary in 1999.