Langstaff, #1 on this list · Photo: Silver Dovelet (CC BY-SA 4.0)

Markham · 2026

Neighbourhoods with the oldest residents in Markham

Bottom of the list: Cornell, with 37.5 years. On the national list, Langstaff is #419 of 2,589. The national top 100 holds no neighbourhood from Markham. Leading Markham on this list is Langstaff, at 49.5 years. The places after the leader belong to German Mills (48.7 years) and Thornlea (47.8 years). Halfway down the list sits Greensborough, at 40.7 years.

Median age of residents, 2021 census (for a city’s neighbourhoods, estimated from five-year age groups) How grades work

#1

Langstaff

Ontario · 8,147 people

49.5 years Median age

Overall B⁺·#608 of 2,556

Strongest: walkability A⁺, schools A·lowest: cost of living D⁻

#2

German Mills

Ontario · 11,923 people

48.7 years Median age

Overall A⁻·#309 of 2,556

Strongest: schools A⁺, health A·lowest: cost of living C⁻

#3

Thornlea

Ontario · 20,872 people

47.8 years Median age

Overall A⁻·#419 of 2,556

Strongest: schools A⁺, walkability A⁺·lowest: cost of living D⁻

Photos: Langstaff, Silver Dovelet (CC BY-SA 4.0) · German Mills, Sikander Iqbal (CC BY-SA 4.0) · Thornlea, Wesoree (CC BY-SA 4.0), via Wikimedia Commons.

Sources: TownRatings grades: our own summary of the data, ranking Canadian towns against each other only, run #73 of 10 November 2026. Under the Statistics Canada Open Licence.

Adapted from Statistics Canada (Census of Population 2021, population estimates 2025, 2021 census boundaries) under the Statistics Canada Open Licence; this does not constitute an endorsement by Statistics Canada. Neighbourhood names in some cities © OpenStreetMap contributors (ODbL).