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