Opening hours of Post Office in Gretna, Tasmania Opening hours of Post Office in Gretna, Tasmania Home / Tasmania / Gretna / Post Office Post Office Australia Post 3423 Lyell Highway, Gretna, Tasmania 7140 +61 3 6286 1332 Categories of local businesses in Gretna Arts & Entertainment Automotive Bus station Camp Campground Camping farm Church Establishment Finance Holiday accommodation service Hotel Industry & Agriculture Lodging Park Place of Worship Post Office Transit station