Costco 7311 N Melvina Ave, Niles, IL60714 Costco is a full-service discount store for members only. This is a big warehouse with multiple departments including…More appliances, baby and kids, computer and electronics, grocery and flowers, hardware, health and beauty, home and outdoor, jewelry, furniture and decor, entertainment, office products and sports and fitness. The grocery features rotisserie chicken, deli, bakery, fresh meat and produce and beer and wine. The store also has a pharmacy, optical department, hearing aids, auto services, tires, travel services and funeral. There are services for events tickets, insurance and business.