Statistics like this baffle me. Just like the Kennewick 7-11 that sells more Slurpies than any other in the whole United States, the Kennewick Costco is #1 in the nation for pumpkin pie sales. In fact, they're also top 10 in the nation for apple and pecan pies! Now, if you're just too busy or don't have a Costco membership, here's my own personal pumpkin pie tip: While I will say that Costco makes the very best pumpkin pies, my personal #2 favorite is Marie Calendar's in the grocery store frozen section. It bakes up fresh in about an hour, makes your whole house smell terrific and is a very delicious runner up!