Home Postcodes by state WA Castletown Castletown postcode WA Castletown is a locality in Western Australia covered by postcode 6450. Postcode 6450 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Council area Esperance Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Add a free Castletown business listing More business listings in Castletown Suburbs near CastletownStraight-line distance between locality centres.ChadwickWA 6450 · 1.9 kmBandy CreekWA 6450 · 2.3 kmWindaboutWA 6450 · 2.5 kmEsperanceWA 6450 · 2.7 kmNulsenWA 6450 · 3.7 kmSinclairWA 6450 · 4.0 kmWest BeachWA 6450 · 4.1 kmPink LakeWA 6450 · 4.8 kmMonjingupWA 6450 · 6.8 kmMyrupWA 6450 · 11.6 kmMerivaleWA 6450 · 17.8 kmGibsonWA 6448 · 22.7 kmDistances to every suburb around Castletown Businesses in CastletownCastletown Primary School43 Easton Rd · 08 90715599 Also in postcode 6450Bandy CreekWA 6450BeaumontWA 6450BoyatupWA 6450Cape Le GrandWA 6450CascadeWA 6450ChadwickWA 6450CondingupWA 6450CoomalbidgupWA 6450DalyupWA 6450East MunglinupWA 6450EsperanceWA 6450HowickWA 6450MerivaleWA 6450MonjingupWA 6450MunglinupWA 6450MyrupWA 6450NeridupWA 6450NulsenWA 6450Pink LakeWA 6450SinclairWA 6450West BeachWA 6450WindaboutWA 6450 Common questionsWhat is the postcode for Castletown?Castletown, WA has the postcode 6450.What state is Castletown in?Castletown is in Western Australia (WA).What council is Castletown in?Castletown is in the Esperance local government area.Does postcode 6450 cover more than one suburb?Yes. Postcode 6450 covers 23 localities, so the postcode alone does not identify Castletown.What suburbs are near Castletown?The closest are Chadwick (1.9 km), Bandy Creek (2.3 km), Windabout (2.5 km), Esperance (2.7 km) and Nulsen (3.7 km). Distances are straight lines between locality centres. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.