It was linked to Timaru by rail in 1876, and grew after the subdivision of the Pareora Run.

[3] Saint Andrews is described as a rural settlement by Statistics New Zealand, and covers 0.59 km2 (0.23 sq mi).

The settlement is part of the larger Lyalldale statistical area.

Although some people chose not to answer the census's question about religious affiliation, 55.4% had no religion, and 33.8% were Christian.

[4] The Lyalldale statistical area includes Saint Andrews and covers 109.54 km2 (42.29 sq mi).

The percentage of people born overseas was 13.5, compared with 27.1% nationally.