Home Postcode finder NSW Upper Colo Upper Colo postcode NSW Upper Colo is a locality in New South Wales covered by postcode 2756. Postcode 2756 State or territory New South Wales (NSW) Region Nepean Add a free Upper Colo business listing Be the first listing in Upper Colo Common questionsWhat is the postcode for Upper Colo?Upper Colo, NSW has the postcode 2756.What state is Upper Colo in?Upper Colo is in New South Wales (NSW).Does postcode 2756 cover more than one suburb?Yes. Postcode 2756 covers 28 localities, so the postcode alone does not identify Upper Colo. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.