John Joseph Costello


February 17, 1930  –  July 2, 2024


image of John Joseph Costello

John Joseph Costello

John Costello passed away peacefully at Evergreen Hospital in Kirkland WA on July 2nd 2024.  He was 94 years old.  John was born and lived in the Seattle area all his life along with his best friend, his brother Leo.  He attended St George grade school and graduated from Seattle Preparatory High School.  After attending one year at Seattle University, John joined the army and served one year.  He then returned to Seattle University earning a Bachelor of Arts degree.  He attended the University of Washington Law school graduating in 1956.

John practiced law for 40 years and was a partner in the Walthew Law Firm in Seattle where his specialty was Worker’s Compensation.

John married the love of his life, Mary Jo Henninger, in 1960.  The couple had five children:  Diane, Eileen, Michael, Patrick and John Jr.  They also had ten grandchildren:  Ryan, Rachael, Rory, Alicia, Anthony (Tony), Sidney, Jordan, and Colbi, Skylar and Jonah, 2 great grandchildren, Kingsley and Carter, and 3 great granddaughters coming this fall.

John’s parents were born in Washington before it was a state making them pioneers.  John is an honorary pioneer.

John spent a good deal of his retired life volunteering for and supporting charitable organizations.  He was a member of the Knights of Columbus, the Knights of the Holy Sepulchre and the Knights of Malta.  He and Mary Jo delivered food for St Vincent DePaul for many years.  John also served on the Board of Regents for Seattle University.

John was preceded in death by his father Joseph, mother Angela, and brother Leo.

John Costello’s funeral Mass will be held at Holy Family Catholic Church on Wednesday July 10, 2024 at 11am.  A reception will follow.  The burial will be at Calvary Cemetery at 3pm.

One Response to “John Joseph Costello”

  • Tara Krautkramer says:

    I am sorry to hear of his passing and would like to express my condolences to his whole family. He was a very kind and professional attorney, but more importantly, a family man. Prayers of comfort and peace for Mary Jo and the family.

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