Waimakariri and Selwyn districts
Neighbouring Waimakariri District has a slightly older population overall than Christchurch (median age for Waimakariri was 42.6 years in 2013) and is projected to remain higher than Christchurch City's by 2043, reaching a median age of 47.6 years.
Selwyn District has a similar aged population to Christchurch (median age for Selwyn was 38.2 years in 2013) and is projected to be slightly lower than Christchurch City's by 2043, reaching 41.6 years.
Differences within the city (2013)
In 2013, the parts of the city with the highest median ages were located in Banks Peninsula, where each area unit had a median age of at least 45 years. Akaroa had the city's highest median age at 56.2 years. The area units spanning across the Port Hills all had median ages of at least 40 years.
The city's lowest median ages were located close to the university (Ilam had the city's lowest median age at 22.9 years), followed by Riccarton West, Upper Riccarton and Riccarton.