The statistical area of Dobson, which at 170 square kilometres is much larger than the town, had a population of 828 at the 2018 New Zealand census, an increase of 27 people (3.4%) since the 2013 census, and an increase of 21 people (2.6%) since the 2006 census. There were 342 households. There were 459 males and 369 females, giving a sex ratio of 1.24 males per female. The median age was 44.6 years (compared with 37.4 years nationally), with 141 people (17.0%) aged under 15 years, 150 (18.1%) aged 15 to 29, 393 (47.5%) aged 30 to 64, and 147 (17.8%) aged 65 or older.