Parnassus had a population of 1,323 at the 2018 New Zealand census, an increase of 15 people (1.1%) since the 2013 census, and an increase of 51 people (4.0%) since the 2006 census.
The population of Parnassus in 2018 was 1,323, showing an increase of 15 individuals (1.1%) from the 2013 census and a rise of 51 people (4.0%) since the 2006 census.