The practical rules
- Keep your dog leashed and under control at all times, even where pets are welcome.
- Bring waste bags and clean up — stores can revoke welcome status over messes.
- Respect "service animals only" stores: only trained service dogs qualify under the ADA; leaving a pet in the car is safer than pushing the rule.
- When in doubt, call the specific location — franchise and regional rules can differ.
People also ask
Are dogs allowed in Costco?
Not as pets — Costco admits trained service animals only, so a pet dog stays home (or in the car, weather permitting).
Are dogs allowed inside Costco?
No — inside Costco, only a trained service animal is admitted under ADA rules. Pets are not permitted in the aisles.
Are dogs allowed outside at Costco?
There is no pet patio policy at Costco — assume no, and call your local store before turning up with a dog.
Can I bring my dog into Costco?
Only a trained service animal may enter Costco; pets are not allowed.
What counts as a service animal?
Under the ADA, a service animal is a dog individually trained to do work for a person with a disability. Emotional-support and therapy pets are not service animals.
What if a store says no?
For "pets welcome" stores, staff can still refuse disruptive animals. For "service animals only" stores, the ADA rule stands — but always stay calm and ask to speak with a manager.