Portobello covers , and is part of the larger
Broad Bay-Portobello statistical area. Portobello had a population of 594 at the
2018 New Zealand census, an increase of 72 people (13.8%) since the
2013 census, and an increase of 93 people (18.6%) since the
2006 census. There were 237 households, comprising 300 males and 291 females, giving a sex ratio of 1.03 males per female, with 111 people (18.7%) aged under 15 years, 57 (9.6%) aged 15 to 29, 306 (51.5%) aged 30 to 64, and 117 (19.7%) aged 65 or older. Ethnicities were 94.4% European/
Pākehā, 11.6%
Māori, 2.5%
Pasifika, 1.5%
Asian, and 2.0% other ethnicities. People may identify with more than one ethnicity. Although some people chose not to answer the census's question about religious affiliation, 66.7% had no religion, 23.2% were
Christian, 0.5% had
Māori religious beliefs and 3.0% had other religions. Of those at least 15 years old, 171 (35.4%) people had a bachelor's or higher degree, and 57 (11.8%) people had no formal qualifications. 93 people (19.3%) earned over $70,000 compared to 17.2% nationally. The employment status of those at least 15 was that 243 (50.3%) people were employed full-time, 84 (17.4%) were part-time, and 12 (2.5%) were unemployed. ==Education==