Sefton is a small town in the Waimakariri District, New Zealand, about 23 kilometres (14 miles) from Christchurch.

[6] It is a decile 7 state non-integrated co-educational full primary, with 146 students (as of November 2024).

Sefton is described by Statistics New Zealand as a rural settlement and covers 0.87 km2 (0.34 sq mi).

Sefton is part of the larger Ashley-Sefton statistical area.

Although some people chose not to answer the census's question about religious affiliation, 65.2% had no religion, 26.1% were Christian, and 2.9% were Muslim.