Sarnia Area Postal Codes

Ontario, Canada · 5 codes

Sarnia Area in Ontario has 5 postal codes, from N7S to N7X, serving 5 places.

Postal codes in Sarnia

Postal Code	Places
N7S	Sarnia Central
N7T	Sarnia Southwest
N7V	Sarnia Northwest
N7W	Sarnia Southeast
N7X	Sarnia Northeast

Frequently asked questions

What is the postal code of Sarnia?

Sarnia has 5 postal codes, from N7S to N7X. The table lists the places each one serves.

How many places are listed in Sarnia Area?

5 places.

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.