Home Postcode finder NSW Gollan Gollan postcode NSW Gollan is a locality in New South Wales covered by postcode 2820. Postcode 2820 State or territory New South Wales (NSW) Region NSW Country West Add a free Gollan business listing Be the first listing in Gollan Common questionsWhat is the postcode for Gollan?Gollan, NSW has the postcode 2820.What state is Gollan in?Gollan is in New South Wales (NSW).Does postcode 2820 cover more than one suburb?Yes. Postcode 2820 covers 25 localities, so the postcode alone does not identify Gollan. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.