Flagstaff covers and had an estimated population of as of with a population density of people per km2. Flagstaff had a population of 12,777 in the
2023 New Zealand census, an increase of 2,949 people (30.0%) since the
2018 census, and an increase of 6,879 people (116.6%) since the
2013 census. There were 6,168 males, 6,576 females and 30 people of
other genders in 4,113 dwellings. 2.4% of people identified as
LGBTIQ+. The median age was 37.5 years (compared with 38.1 years nationally). There were 2,991 people (23.4%) aged under 15 years, 2,013 (15.8%) aged 15 to 29, 5,571 (43.6%) aged 30 to 64, and 2,199 (17.2%) aged 65 or older. ==Education==