Ngaumutawa is a suburb of Masterton, New Zealand.

Ngaumutawa is a Māori language word meaning an oven of the tawa tree. Ngaumutawa was a Māori village or pā in 1853. The Native Land Court assigned title to the land in 1866, and most was sold to pākehā settlers by the end of the decade. Ngaumutawa Road was created about 1904. The area was still rural in 1973 but was under development in 1980.

The rural area southeast of Ngaumutawa is marked as a "Future Development Area" by the Masterton District Council. The plan was criticised for not explicitly including provision for affordable housing.

Ngaumutawa statistical area covers 1.16 km (0.45 sq mi). It had an estimated population of 1,770 as of June 2024, with a population density of 1,526 people per km.

Historical population

Year	Pop.	±% p.a.
2006	1,380	—
2013	1,377	−0.03%
2018	1,491	+1.60%
Source:

Before the 2023 census, the suburb had a smaller boundary, covering 0.85 km (0.33 sq mi). Using that boundary, Ngaumutawa had a population of 1,491 at the 2018 New Zealand census, an increase of 114 people (8.3%) since the 2013 census, and an increase of 111 people (8.0%) since the 2006 census. There were 654 households, comprising 681 males and 810 females, giving a sex ratio of 0.84 males per female. The median age was 46.6 years (compared with 37.4 years nationally), with 270 people (18.1%) aged under 15 years, 228 (15.3%) aged 15 to 29, 585 (39.2%) aged 30 to 64, and 408 (27.4%) aged 65 or older.

Ethnicities were 87.3% European/Pākehā, 19.9% Māori, 3.0% Pasifika, 2.6% Asian, and 1.2% other ethnicities. People may identify with more than one ethnicity.

The percentage of people born overseas was 11.9, compared with 27.1% nationally.

Although some people chose not to answer the census's question about religious affiliation, 49.3% had no religion, 40.0% were Christian, 0.8% had Māori religious beliefs, 0.8% were Hindu, 0.2% were Buddhist and 1.4% had other religions.

Of those at least 15 years old, 129 (10.6%) people had a bachelor's or higher degree, and 339 (27.8%) people had no formal qualifications. The median income was $27,200, compared with $31,800 nationally. 99 people (8.1%) earned over $70,000 compared to 17.2% nationally. The employment status of those at least 15 was that 510 (41.8%) people were employed full-time, 174 (14.3%) were part-time, and 27 (2.2%) were unemployed.