Ponsonby, comprising the statistical areas of Ponsonby West and Ponsonby East, had a population of 5,730 at the 2018 New Zealand census, an increase of 153 people (2.7%) since the 2013 census, and an increase of 243 people (4.4%) since the 2006 census. There were 2,085 households. There were 2,763 males and 2,967 females, giving a sex ratio of 0.93 males per female, with 951 people (16.6%) aged under 15 years, 1,299 (22.7%) aged 15 to 29, 2,970 (51.8%) aged 30 to 64, and 513 (9.0%) aged 65 or older.