Home Postcode finder SA Balhannah Balhannah postcode SA Balhannah is a locality in South Australia covered by postcode 5242. Postcode 5242 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Balhannah business listing More business listings in Balhannah Businesses in BalhannahAdelaide Hills Country Cottages229 Oakwood Road · +61 8 8388 4193 Common questionsWhat is the postcode for Balhannah?Balhannah, SA has the postcode 5242.What state is Balhannah in?Balhannah is in South Australia (SA).Does postcode 5242 cover more than one suburb?No. Postcode 5242 covers Balhannah only, which is unusual - most Australian postcodes cover several localities. Browse other postcodes in South Australia, or widen the search to every Australian postcode.