Grandparent visitation is a legal right that grandparents in some jurisdictions may have for court-ordered contact, or visitation, with their grandchildren. In the U.S., grandparents can ask a court for the legal right to maintain ongoing contact with their grandchildren. Not every state allows grandparents this court order. State laws vary. The reason for these laws is that children may not have the opportunity to have contact with the non-custodial parent and his or her relatives (because of a parent’s death or due to divorce).
Here on LawServer you’ll find relevant state laws about grandparent visitation rights.