Edgecumbe had a population of 1,644 at the 2018 New Zealand census, an increase of 6 people (0.4%) since the 2013 census, and an increase of 18 people (1.1%) since the 2006 census. There were 546 households. There were 855 males and 786 females, giving a sex ratio of 1.09 males per female. The median age was 34.5 years (compared with 37.4 years nationally), with 402 people (24.5%) aged under 15 years, 330 (20.1%) aged 15 to 29, 654 (39.8%) aged 30 to 64, and 255 (15.5%) aged 65 or older.