The statistical area of Kinleith is 947 square kilometres and surrounds Tokoroa. It had a population of 1,446 at the 2018 New Zealand census, a decrease of 18 people (-1.2%) since the 2013 census, and an increase of 333 people (29.9%) since the 2006 census. There were 543 households. There were 789 males and 657 females, giving a sex ratio of 1.2 males per female. The median age was 33.8 years (compared with 37.4 years nationally), with 324 people (22.4%) aged under 15 years, 324 (22.4%) aged 15 to 29, 636 (44.0%) aged 30 to 64, and 165 (11.4%) aged 65 or older.