West Eyreton is a small rural village in the Canterbury region of New Zealand's South Island. It is west of Kaiapoi and north-west of Eyreton and is named after Edward John Eyre, a 19th-century lieutenant governor of the South Island, then known as New Munster. In the 2001 New Zealand census the population was 1,146 (573 males and 573 females), an increase of 306 or 36.4% since the 1996 census.

In the 1870s, poor transport led to the construction of the Eyreton Branch railway line, which opened on 17 December 1875. Despite its name it ran to the north of Eyreton and originally terminated in West Eyreton, extended to Bennetts Junction on the Oxford Branch on 1 February 1878. Beyond Horrelville closed on 9 February 1931, and on 26 May 1954 low traffic led to the closure of the branch. Little remains besides some of the formation and a loading bank at the site of station.

The West Eyreton statistical area covers 114.89 km² (44.36 sq mi).^[1] It had an estimated population of 1,600 as of June 2023,^[2] with a population density of 13.9 people per km².

West Eyreton had a population of 1,464 at the 2018 New Zealand census, an increase of 90 people (6.6%) since the 2013 census, and an increase of 363 people (33.0%) since the 2006 census. There were 507 households, comprising 753 males and 711 females, giving a sex ratio of 1.06 males per female. The median age was 45.0 years (compared with 37.4 years nationally), with 300 people (20.5%) aged under 15 years, 210 (14.3%) aged 15 to 29, 756 (51.6%) aged 30 to 64, and 195 (13.3%) aged 65 or older.

Ethnicities were 94.7% European/Pākehā, 5.7% Māori, 0.6% Pasifika, 3.7% Asian, and 1.8% other ethnicities. People may identify with more than one ethnicity.

The percentage of people born overseas was 16.8, compared with 27.1% nationally.

Although some people chose not to answer the census's question about religious affiliation, 52.3% had no religion, 36.7% were Christian, 0.2% had Māori religious beliefs, 0.2% were Hindu, 0.2% were Buddhist and 2.3% had other religions.

Of those at least 15 years old, 216 (18.6%) people had a bachelor's or higher degree, and 180 (15.5%) people had no formal qualifications. The median income was $40,200, compared with $31,800 nationally. 273 people (23.5%) earned over $70,000 compared to 17.2% nationally. The employment status of those at least 15 was that 642 (55.2%) people were employed full-time, 216 (18.6%) were part-time, and 24 (2.1%) were unemployed.^[3]

West Eyreton School is West Eyreton's only school. It is a state coeducational full primary school^[4] with a decile rating of 10 and a roll of 172 students (as of February 2024).^[5]