Home Postcode finder NSW Mayfield Mayfield postcode NSW Mayfield is a locality in New South Wales covered by postcode 2540. Postcode 2540 State or territory New South Wales (NSW) Region NSW Country West Add a free Mayfield business listing More business listings in Mayfield Businesses in MayfieldElite Kitchens62 Maitland Road, Mayfield NSW 2304, Australia · 024967 3354Elite Kitchens & Bars62 Maitland Road, Mayfield NSW 2304, Australia · 02 4967 3354Elite Kitchens & Bars62 Maitland Road · (02) 4967 3354 Common questionsWhat is the postcode for Mayfield?Mayfield, NSW has the postcode 2540.What state is Mayfield in?Mayfield is in New South Wales (NSW).Does postcode 2540 cover more than one suburb?Yes. Postcode 2540 covers 68 localities, so the postcode alone does not identify Mayfield. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.