John-Michael Costello

October 28, 1970 ~ December 4, 2019 (age 49)


 John-Michael Costello, 49, of Watertown died suddenly December 4, 2019.


John is survived by his mother, Mary Costello. John also leaves his two sisters: Kristine and her husband Timothy and their three children, Julia, Shawn and James, and Denise and her husband Ralph and their two children, Casey and Samantha, who was also his Goddaughter.


Throughout his life, John loved fishing, motorcycles and all Boston sports teams. He always had a joke ready or a funny story and will be missed by his family and many friends.


In lieu of flowers, please consider making a donation in John’s memory to the Watertown Boys and Girls Club or the Society of St.Vincent de Paul.


A funeral mass will be held on December 19, 2019 at St. Patrick Church in Watertown, MA at 11 AM.

To send flowers to the family or plant a tree in memory of John-Michael Costello, please visit our floral store.


Funeral Mass
December 19, 2019

11:00 AM
Church of Saint Patrick
212 Main Street
Watertown, MA 02472


Watertown Boys & Girls Club
25 Whites Ave., Watertown MA 02472
Tel: 1-617-926-0968

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