Tāhunanui is one of the suburbs of Nelson, New Zealand. It lies between Port Nelson and Nelson Airport and is the site of the main beach for Nelson with a shoreline on the Tasman Bay.^[3]

The New Zealand Ministry for Culture and Heritage gives a translation of "large sandbank" for Tāhunanui.^[4]

The Tāhunanui statistical area covers 1.61 km² (0.62 sq mi).^[1] It had an estimated population of 2,950 as of June 2023,^[2] with a population density of 1,832 people per km².

Tāhunanui had a population of 2,745 at the 2018 New Zealand census, an increase of 156 people (6.0%) since the 2013 census, and an increase of 252 people (10.1%) since the 2006 census. There were 1,206 households, comprising 1,374 males and 1,371 females, giving a sex ratio of 1.0 males per female. The median age was 41.8 years (compared with 37.4 years nationally), with 453 people (16.5%) aged under 15 years, 549 (20.0%) aged 15 to 29, 1,245 (45.4%) aged 30 to 64, and 501 (18.3%) aged 65 or older.

Ethnicities were 86.3% European/Pākehā, 15.5% Māori, 2.3% Pasifika, 5.1% Asian, and 2.1% other ethnicities. People may identify with more than one ethnicity.

The percentage of people born overseas was 18.7, compared with 27.1% nationally.

Although some people chose not to answer the census's question about religious affiliation, 57.8% had no religion, 29.3% were Christian, 0.5% had Māori religious beliefs, 0.3% were Hindu, 0.2% were Muslim, 1.4% were Buddhist and 2.4% had other religions.

Of those at least 15 years old, 336 (14.7%) people had a bachelor's or higher degree, and 507 (22.1%) people had no formal qualifications. The median income was $27,300, compared with $31,800 nationally. 159 people (6.9%) earned over $70,000 compared to 17.2% nationally. The employment status of those at least 15 was that 1,098 (47.9%) people were employed full-time, 357 (15.6%) were part-time, and 78 (3.4%) were unemployed.^[7]