Home Postcode finder NSWDL St Fillans St Fillans postcode NSWDL St Fillans is a locality in New South Wales covered by postcode 2850. Postcode 2850 State or territory New South Wales (NSWDL) Region NSW Country West Add a free St Fillans business listing Be the first listing in St Fillans Common questionsWhat is the postcode for St Fillans?St Fillans, NSWDL has the postcode 2850.What state is St Fillans in?St Fillans is in New South Wales (NSWDL).Does postcode 2850 cover more than one suburb?Yes. Postcode 2850 covers 77 localities, so the postcode alone does not identify St Fillans. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.