John Raymond Costello
Mar 7th, 2026
John Raymond Costello, 62, a longtime resident of Dennis, Massachusetts, passed away on March 7, 2026.
Born June 16, 1963, in Weston, Massachusetts. John attended Weston High School before continuing his education at Boston College and later earning his Juris Doctor, summa cum laude, from Suffolk University Law School.
On May 6, 1988, he married his beloved wife and best friend, Suzanne “Suzi” Costello. Together, they created a life centered on their love. His children, Michael Costello of Dennis and John Robert Costello of Boston, were the pride and joy of his days. His family was the reason for everything he achieved, providing them with all that a father could.
Earlier in his career, John served as Chief Complaint Counsel for the Massachusetts Board of Registration in Medicine, commuting daily from Dennis to Wakefield for nearly five years.
His proudest professional chapter came later in life while he served as First Assistant Clerk Magistrate for the Barnstable County District Court. In that role, John became known for his fairness, integrity, and sharp intellect. He believed deeply in treating every person who entered the courtroom with dignity and respect, carrying that principle into every case and conversation. Colleagues throughout the Barnstable legal community knew him as thoughtful, principled, and deeply committed to public service. It was work he took great pride in and considered the honor of his professional life.
A devoted father, John coached and encouraged his children in baseball, travel soccer, basketball, musical interests and performing arts. Known for his humor, creativity, and kindness, he had a gift for making people feel understood and welcome in his presence. Above all, John believed in showing up for people. His home was always open. His children's friends were treated as family the very moment they walked through his door.
John enjoyed funk music, cult classic movies, bringing home a bargain, and cheering on the Boston Bruins. A talented writer and skilled craftsman, he loved knowing the perfect way to fix things with his hands and his words. He could truly build anything he “mocked up” in his thoughtful artistic vision.
He was predeceased by his parents, Ora Ann Costello (Kelly) and John Walter Costello.
He is survived by his beloved wife, Suzanne Costello; his children, Michael Costello of Dennis and John Robert Costello of Boston; his siblings Maureen Trippe, Brian Costello, TJ Costello, Matthew Costello; his extended siblings Robert Richards, Michelle Cooney, and Jennifer Getchell; as well as his many adored nieces, nephews, and cousins.
A remembrance will be held Saturday, March 21, from 9 a.m. to noon at Hallett Funeral Home, 273 Station Ave., South Yarmouth, with a eulogy at approximately 11 a.m.