Tremaine is a small community in Manawatu-Whanganui with a population of 429 and a median age of 28. Median personal income is $31K per year. The main ethnic groups are European, Māori, Pacific Peoples.

Livability indicators for Tremaine: NZDep decile 10 (high deprivation); 3 schools with avg EQI 471.

In 2026, Tremaine recorded 3 building approvals (3 houses, 0 units), down 92.9% year-on-year.