Melville covers and had an estimated population of as of with a population density of people per km2. Melville had a population of 5,652 in the
2023 New Zealand census, an increase of 429 people (8.2%) since the
2018 census, and an increase of 1,065 people (23.2%) since the
2013 census. There were 2,751 males, 2,865 females and 36 people of
other genders in 1,941 dwellings. 4.2% of people identified as
LGBTIQ+. The median age was 31.8 years (compared with 38.1 years nationally). There were 1,227 people (21.7%) aged under 15 years, 1,323 (23.4%) aged 15 to 29, 2,622 (46.4%) aged 30 to 64, and 477 (8.4%) aged 65 or older. == Education ==