Mornington covers and had an estimated population of as of with a population density of people per km2. Mornington had a population of 2,802 at the
2018 New Zealand census, an increase of 99 people (3.7%) since the
2013 census, and a decrease of 18 people (−0.6%) since the
2006 census. There were 1,176 households, comprising 1,374 males and 1,428 females, giving a sex ratio of 0.96 males per female. The median age was 35.0 years (compared with 37.4 years nationally), with 468 people (16.7%) aged under 15 years, 699 (24.9%) aged 15 to 29, 1,305 (46.6%) aged 30 to 64, and 330 (11.8%) aged 65 or older. Ethnicities were 84.6% European/
Pākehā, 12.1%
Māori, 4.2%
Pasifika, 8.6%
Asian, and 2.8% other ethnicities. People may identify with more than one ethnicity. The percentage of people born overseas was 19.8, compared with 27.1% nationally. Although some people chose not to answer the census's question about religious affiliation, 59.0% had no religion, 27.5% were
Christian, 0.4% had
Māori religious beliefs, 1.3% were
Hindu, 0.7% were
Muslim, 1.0% were
Buddhist and 3.0% had other religions. Of those at least 15 years old, 729 (31.2%) people had a bachelor's or higher degree, and 348 (14.9%) people had no formal qualifications. The median income was $31,700, compared with $31,800 nationally. 315 people (13.5%) earned over $70,000 compared to 17.2% nationally. The employment status of those at least 15 was that 1,200 (51.4%) people were employed full-time, 396 (17.0%) were part-time, and 87 (3.7%) were unemployed. ==Education==