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 has been growing steadily, with a significant jump in size between 2013 and 2018. The population increased by 27 individuals (23.1%) compared to the 2013 census, and an even more substantial rise of 42 people (41.2%) from the 2006 census.