This article originally concerned the 2018 election. Those dates and deadlines have passed.
For a current election, check eligibility, registration, identification rules, assigned polling place and hours with your official election authority. Do not assume you can vote at an arbitrary alternate location.
Under the ADA, election officials must modify no-animal policies to allow voters with disabilities to use service animals in public areas of the polling place. Ask election staff about accessible equipment or assistance you need.
Plan water, toilet opportunities and comfortable waiting for your dog. Keep the dog under control and clear of walkways. A vest, registry card or an advance permission call is not an ADA requirement.
If access is challenged, ask the supervising election official for assistance and record the details. Use the current official complaint process for your jurisdiction.