Opening hours of Post Office in Lock, South Australia Opening hours of Post Office in Lock, South Australia Home / South Australia / Lock / Post Office Post Office Australia Post 14 Dearman Street, Lock, South Australia 5633 +61 8 8689 1020 Post Office Lock Post Office 9 Railway Terrace, Lock, South Australia 5633 +61 8 8689 1020 Categories of local businesses in Lock Airport Art Gallery Bank Car repair Church Establishment Finance Fire Station Food Gas Station Lodging Park Place of Worship Police Post Office RV Park School Storage Train station Transit station