Home Postcode finder NSWDL Seaham Seaham postcode NSWDL Seaham is a locality in New South Wales covered by postcode 2324. Postcode 2324 State or territory New South Wales (NSWDL) Region Hunter Add a free Seaham business listing More business listings in Seaham Businesses in SeahamSeaham Public School4c Still St · 02 49886234 Common questionsWhat is the postcode for Seaham?Seaham, NSWDL has the postcode 2324.What state is Seaham in?Seaham is in New South Wales (NSWDL).Does postcode 2324 cover more than one suburb?Yes. Postcode 2324 covers 22 localities, so the postcode alone does not identify Seaham. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.