Taieri Mouth is described by Statistics New Zealand as a rural settlement. It covers , and had an estimated population of as of with a population density of people per km2. It is part of the much larger
Bruce statistical area. Taieri Mouth had a population of 252 at the
2018 New Zealand census, an increase of 57 people (29.2%) since the
2013 census, and an increase of 63 people (33.3%) since the
2006 census. There were 108 households, comprising 132 males and 123 females, giving a sex ratio of 1.07 males per female. The median age was 52.8 years (compared with 37.4 years nationally), with 39 people (15.5%) aged under 15 years, 18 (7.1%) aged 15 to 29, 123 (48.8%) aged 30 to 64, and 72 (28.6%) aged 65 or older. Ethnicities were 95.2% European/
Pākehā, 10.7%
Māori, 1.2%
Pasifika, and 3.6% other ethnicities. People may identify with more than one ethnicity. Although some people chose not to answer the census's question about religious affiliation, 54.8% had no religion, 29.8% were
Christian, 1.2% had
Māori religious beliefs and 1.2% had other religions. Of those at least 15 years old, 36 (16.9%) people had a bachelor's or higher degree, and 57 (26.8%) people had no formal qualifications. The median income was $28,000, compared with $31,800 nationally. 15 people (7.0%) earned over $70,000 compared to 17.2% nationally. The employment status of those at least 15 was that 81 (38.0%) people were employed full-time, 45 (21.1%) were part-time, and 3 (1.4%) were unemployed. ==Education==