Opening hours of Post Office in Grass Valley, Western Australia Opening hours of Post Office in Grass Valley, Western Australia Home / Western Australia / Grass Valley / Post Office Post Office Australia Post - Grass Valley CPA 16 Carter Rd, Grass Valley WA 6403, Australia, Grass Valley, Western Australia 6403 +61 8 9622 9601 Categories of local businesses in Grass Valley Establishment Food Industry & Agriculture Lodging Post Office Restaurant Train station Transit station