Rotherham had a population of 144 at the 2018 New Zealand census, an increase of 27 people (23.1%) since the 2013 census, and an increase of 42 people (41.2%) since the 2006 census.
Rotherham's population growth is evident in the data: a 27-person increase (23.1%) between 2013 and 2018, and a 42-person increase (41.2%) from 2006 to 2018.