Guittar married his high school sweetheart, Joan Mayo, and the two had five children. The marriage ended in divorce, and he was remarried to Elizabeth Madden Shedrick, who died in 2019. He and Shedrick had three children together, and were long-time residents of Martha's Vineyard. He died on March 26, 2020, at his home in Fort Lauderdale, Florida, of natural causes and is survived by his eight children, 22 grandchildren, and 9 great-grandchildren.
