Home Postcodes by state TAS 7139 Postcode 7139 7139 is the postcode for Strathgordon, TAS. Localities with postcode 7139StrathgordonTAS Postcode 7139 State or territory Tasmania (TAS) Localities 1 Council area Derwent Valley Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 7120 · Postcode 7140