About Markham
Markham is a city in Ontario, Canada with a population of 338,503. It is the 17th largest of the 295 cities of 15,000 or more listed in Canada, and the 1,694th largest worldwide. It lies 330 km from Ottawa.
Key Facts
Country
Region
Rank in region
#8of 100
Elevation
168 m
Approximate — modelled, not surveyed
Time zone
America/Toronto
Coordinates
43.867, -79.266
Record updated
2025-08-04
Entry edited, not measured
City population, GeoNames. GeoNames publishes no year for its population figures, so “record updated” is when the entry was last edited — not the date the population was measured. Elevation is modelled from a digital elevation model rather than surveyed, so it is approximate.
Nearby Cities
All 295 in CanadaClosest listed cities by great-circle distance from the city centre.