Cornwall Area Postal Codes
Ontario, Canada · 3 codes
Cornwall Area in Ontario has 3 postal codes, from K6H to K6K, serving 3 places.
Postal codes in Cornwall
Frequently asked questions
What is the postal code of Cornwall?
Cornwall has 3 postal codes, from K6H to K6K. The table lists the places each one serves.
How many places are listed in Cornwall Area?
3 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.