All grocery stores will be open in New Jersey and the greater metropolitan area on Martin Luther King Jr. Day 2026

As such, it's common for Costco to close its doors on major holidays. But Costco will not be closing to members on Dr. Martin Luther King Jr. Day, which falls this year on Monday, January 19. That gives members an opportunity to stock up on the items they need without having to change their shopping plans.

While Costco warehouses are closed on many major holidays throughout the year, stores will remain open on Martin Luther King Jr. Day. The wholesaler will operate during normal business hours on Monday, Jan. 19. Since hours vary among locations, confirm your local Costco's open and close times before going.