Ellerslie comprises four statistical areas. Ellerslie Central, East and South are primarily residential. Ellerslie West, which is separated from the rest of the suburb by the
Auckland Southern Motorway, is commercial/industrial.
Residential area The residential area of Ellerslie covers and had an estimated population of as of with a population density of people per km2. Ellerslie's residential area had a population of 8,688 in the
2023 New Zealand census, a decrease of 384 people (−4.2%) since the
2018 census, and an increase of 66 people (0.8%) since the
2013 census. There were 4,203 males, 4,440 females and 48 people of
other genders in 3,246 dwellings. 4.7% of people identified as
LGBTIQ+. There were 1,581 people (18.2%) aged under 15 years, 1,785 (20.5%) aged 15 to 29, 4,323 (49.8%) aged 30 to 64, and 1,002 (11.5%) aged 65 or older.
Commercial/Industrial area Ellerslie West covers 7.9% of people identified as
LGBTIQ+. The median age was 36.1 years (compared with 38.1 years nationally). There were 15 people (13.2%) aged under 15 years, 18 (15.8%) aged 15 to 29, 66 (57.9%) aged 30 to 64, and 12 (10.5%) aged 65 or older. ==Local government==