Western Bay of Plenty District had a population of 51,321 at the 2018 New Zealand census, an increase of 7,629 people (17.5%) since the 2013 census, and an increase of 9,495 people (22.7%) since the 2006 census. There were 18,462 households. There were 25,647 males and 25,677 females, giving a sex ratio of 1.0 males per female. Of the total population, 9,555 people (18.6%) were aged up to 15 years, 8,130 (15.8%) were 15 to 29, 22,881 (44.6%) were 30 to 64, and 10,758 (21.0%) were 65 or older. Figures may not add up to the total due to rounding.