Costco is closed on Independence Day 2019 by Rhonda July 16, 2020 354 7/4/19. Happy 4th of July! Costco will be closed today. 0 FacebookTwitterPinterestEmail previous post Costco Sale: Bayside Furnishings Lila Writing Desk $99.99 next post Gourmet Basics by Mikasa 4-Tier Market Basket at Costco! You may also like Costco Coupon Book OCTOBER 2023 Fall Food Sale at Pacific Northwest Costco Stores! Fruit and Cheese Tray at Costco! Acacia Grazing Board at Costco! Beautiful Lenox Holiday Florentine & Pearl Lit Figurines... White Ceramic Christmas Trees at Costco!