Ōpaki is a small rural settlement in the Masterton District and Wellington Region of New Zealand's North Island.

The centre of the village was bypassed in 1938, when a bridge replaced the railway level crossing,[3] on what is now SH2.

[4] Ōpaki statistical area covers 35.62 km2 (13.75 sq mi).

Before the 2023 census, the statistical area had a larger boundary, covering 36.04 km2 (13.92 sq mi).

[8] School buses serve the neighbouring settlements of Rangitumau, Mauriceville and Mikimiki.