Postal Code L3S

Markham Southeast · Markham, Ontario

L3S is the postal code of Markham Southeast in Markham, Ontario, Canada. This list covers forward sortation areas (FSA) — the first three characters of a Canadian postal code, such as T0A.

Postal Code: L3S
Area: Markham
Province: Ontario
Country: Canada

Place with postal code L3S

Place	Area	Location
Markham Southeast	Markham	43.849, -79.262

Near Toronto

The nearest major city is Toronto, about 19 km away.

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Sunrise & sunset

Nearby postal codes

All postal codes in Markham →

Frequently asked questions

Which places use postal code L3S?

Markham Southeast.

Which area and province is L3S in?

Markham, Ontario, Canada.

What is the nearest major city to L3S?

Toronto, about 19 km away.

Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.