Suggest an Edit Name* Categories* Clothing store Convenience store Department store Electronics store Furniture store Hardware store Home goods store Jewelry store Liquor store Pet store Shopping mall Supermarket Add category State* Locality* ZIP* Street address* Phone* Website Opening hours Sunday: 10:00 am — 06:00 pm Monday: 10:00 am — 08:30 pm Tuesday: 10:00 am — 08:30 pm Wednesday: 10:00 am — 08:30 pm Thursday: 10:00 am — 08:30 pm Friday: 10:00 am — 08:30 pm Saturday: 09:30 am — 06:00 pm Company description Your comments (not for publishing) * — Required information Costco Wholesale ← View details 16375 Washington Street, Thornton, CO 80023 +1 303-474-3247