The four urban areas combined had a usual resident population of 401,850 at the 2018 New Zealand census, an increase of 26,307 people (7.0%) since the 2013 census, and an increase of 42,726 people (11.9%) since the 2006 census. There were 196,911 males and 204,936 females, giving a sex ratio of 0.961 males per female. Of the total population, 74,892 people (18.6%) were aged up to 15 years, 93,966 (23.4%) were 15 to 29, 185,052 (46.1%) were 30 to 64, and 47,952 (11.9%) were 65 or older.