Henderson, comprising the statistical areas of Henderson Central, Henderson Valley Park, Henderson North East and Henderson East, had a population of 8,706 at the 2018 New Zealand census, an increase of 777 people (9.8%) since the 2013 census, and an increase of 1,677 people (23.9%) since the 2006 census. There were 2,892 households. There were 4,179 males and 4,533 females, giving a sex ratio of 0.92 males per female, with 1,704 people (19.6%) aged under 15 years, 1,830 (21.0%) aged 15 to 29, 3,636 (41.8%) aged 30 to 64, and 1,542 (17.7%) aged 65 or older.