US-based warehouse club Costco has opened the doors of its first Australian store.

Located in Melbourne, the 155,000 sq ft store attracted more than 1,000 shoppers within the first hour of trading. The store features about 3,600 SKUs comprising groceries, electronics, clothing, DVDs, books and furnishings.

Fresh food is predominantly sourced locally, but dry groceries are a mix of locally sourced and imported goods.

A second Costco store has been confirmed for Auburn, Sydney.