Mount Roskill, comprising the statistical areas of Mount Roskill North, Mount Roskill White Swan, Mount Roskill Central North, Mount Roskill Central South and Mount Roskill South, had a population of 17,319 at the 2018 New Zealand census, an increase of 1,188 people (7.4%) since the 2013 census, and an increase of 1,983 people (12.9%) since the 2006 census. There were 5,187 households. There were 8,754 males and 8,556 females, giving a sex ratio of 1.02 males per female, with 2,853 people (16.5%) aged under 15 years, 4,788 (27.6%) aged 15 to 29, 7,605 (43.9%) aged 30 to 64, and 2,064 (11.9%) aged 65 or older.