Tiroa covers and had an estimated population of as of with a population density of people per km2. Tiroa had a population of 45 in the
2023 New Zealand census, an increase of 3 people (7.1%) since the
2018 census, and a decrease of 6 people (−11.8%) since the
2013 census. There were 27 males and 18 females in 21 dwellings. The median age was 41.4 years (compared with 38.1 years nationally). There were 3 people (6.7%) aged under 15 years, 12 (26.7%) aged 15 to 29, 21 (46.7%) aged 30 to 64, and 9 (20.0%) aged 65 or older. ==References==