Aidanfield covers . It had an estimated population of as of with a population density of people per km2. Aidanfield had a population of 3,903 at the
2018 New Zealand census, an increase of 1,011 people (35.0%) since the
2013 census, and an increase of 2,607 people (201.2%) since the
2006 census. There were 1,242 households, comprising 1,842 males and 2,064 females, giving a sex ratio of 0.89 males per female. The median age was 38.1 years (compared with 37.4 years nationally), with 744 people (19.1%) aged under 15 years, 717 (18.4%) aged 15 to 29, 1,746 (44.7%) aged 30 to 64, and 699 (17.9%) aged 65 or older. Ethnicities were 64.0% European/
Pākehā, 3.8%
Māori, 1.2%
Pasifika, 33.1%
Asian, and 2.7% other ethnicities. People may identify with more than one ethnicity. The percentage of people born overseas was 35.9, compared with 27.1% nationally. Although some people chose not to answer the census's question about religious affiliation, 46.6% had no religion, 43.9% were
Christian, 0.1% had
Māori religious beliefs, 1.5% were
Hindu, 0.8% were
Muslim, 1.5% were
Buddhist and 1.3% had other religions. Of those at least 15 years old, 960 (30.4%) people had a bachelor's or higher degree, and 465 (14.7%) people had no formal qualifications. The median income was $33,600, compared with $31,800 nationally. 651 people (20.6%) earned over $70,000 compared to 17.2% nationally. The employment status of those at least 15 was that 1,488 (47.1%) people were employed full-time, 456 (14.4%) were part-time, and 69 (2.2%) were unemployed. ==Subdivision development and amenities==