Can a person under guardianship vote in Massachusetts? Yes!
The right to vote is protected by the US Constitution. In Massachusetts, this right can only be taken away by a judge with just cause (in other words, a good reason). If you think your child has the capacity to vote, be prepared to tell the judge your argument. This right applies to people under both limited guardianship and full (general) guardianship.
A few notes:
For people under limited guardianship: some lawyers also write into the Petition form "retains the right to vote," just to be sure.
If your family member gets services from the Department of Developmental Services (DDS), you can include a note in their service plan that they want to vote.
Your City or Town Clerk can also help with voter registration for people with disabilities.
How to register:
Register online at the MA Secretary of State website.
Go to your City or Town Clerk's office to register in person or ask questions.
Sources: Jackins (2010)