(on port washington)
Commercial Warehouses in Grafton, WI
Commercial Warehouses
Wholesale Stores


950 N Port Washington Rd
Grafton, WI


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Latest Costco Reviews (Average Rating: 4)

based on 47 review(s)

Everything is wonderful, well in stock, and always some wonderful ew goodies to be found. The parking lot is full but never crammed inside. Checkout lanes...

Tracy K. January 16, 2022 via Yelp

My first Costco! Even though it's been a solid decade of frequenting this location, I can't believe I never Yelped it!? Well, crossing that off my bucket...

Warren D. March 4, 2020 via Yelp

I just want to offer thanks again to Costco for staying the course on their Coronavirus response ... even as much of the rest of the country gets a bit...

Phillip W. May 27, 2020 via Yelp


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  • What is the phone number for Costco in Grafton WI?
    You can reach them at: 262-204-1050. It’s best to call Costco during business hours.
  • What is the address for Costco on port washington in Grafton?
    Costco is located at this address: 950 N Port Washington Rd Grafton, WI 53024.