As of Sep 3, 2017, Costco operated 741 warehouses including 514 in 44 states, Washington D.C. and Puerto Rico, 97 in Canada, 37 in Mexico, 28 in the UK, 26 in Japan, 13 in South Korea, 13 in Taiwan, 9 in Australia, 2 in Spain, and 1 each in France and Ireland.

In fiscal 2017, the company opened 28 new warehouses and closed 2 existing warehouses. The company plans to open up to 24 new warehouses and relocate up to 6 warehouses in fiscal 2018.

At year-end, Costco owned the land and/or the building at 587 store locations, owned the building on leased land at 102 locations and leased 52 store locations. Overall, warehouse clubs averaged 145,000 square feet, with stores in the US averaging 147,000 square feet, stores in Canada averaging 139,000 square feet and other international locations averaging 142,000 square feet.

TTM20172016201520142013
Stores741741715686663634
Store growth3.6%3.6%4.2%3.5%4.6%4.3%
Total gross square feet (M)107,300107,300103,20098,70095,30090,805
Total gross square feet growth4.0%4.0%4.6%3.6%5.0%4.4%
Avg store gross sq ft144,800144,800144,300143,900143,700143,200
Avg store gross sq ft growth0.3%0.3%0.3%0.1%0.4%0.2%