Horsham Downs covers and had an estimated population of as of with a population density of people per km2. Horsham Downs had a population of 834 in the
2023 New Zealand census, an increase of 120 people (16.8%) since the
2018 census, and an increase of 147 people (21.4%) since the
2013 census. There were 411 males and 420 females in 270 dwellings. 2.5% of people identified as
LGBTIQ+. The median age was 41.5 years (compared with 38.1 years nationally). There were 162 people (19.4%) aged under 15 years, 168 (20.1%) aged 15 to 29, 375 (45.0%) aged 30 to 64, and 129 (15.5%) aged 65 or older. == Education ==