John B. Hainsworth III
November 1, 1959 - August 5, 2026
John B. Hainsworth III, age 66, of New Castle, DE, passed away on Wednesday, August 5, 2026.
Born in Wilmington, DE, on November 1, 1959, he was a son of John B. Hainsworth, Jr. and Gertrude “Trudy” (Valente) Welch. John made his career as a machinist supervisor at Du Hadaway Tool & Die for 48 years.
John loved his family, whether it was attending his kids or grandkids events, or enjoying a day floating in the pool. He was an avid sports fan, even if his Phillies or Cowboys let him down more times than not, he loved watching them (and yelling at them through the TV)! John’s ideal summer day was napping on the beach, then enjoying a nice stroll on the boardwalk at night. He was Mr. Fix-It, if something could be fixed, he would figure out how to do it. He’d much rather fix something than replace it.
John was preceded in death by his stepfather, Bernard Welch. He is survived by his loving wife of 44 years, Mary L. (Wyszynski) Hainsworth; children, Kristin Hainsworth, Stacy Murphy (Kevin), and Nick Hainsworth; father, John Hainsworth, Jr.; mother, Trudy Welch; brother, Kevin Welch; and grandchildren, Bailey, James, and Kiley.
All services will be held privately.
In lieu of flowers, donations may be made in John’s memory to St. Jude Children’s Research Hospital, 501 St. Jude Place, Memphis, TN 38105 or online by clicking here.
Anita Valente
Our deepest sympathy to John’s family and friends. He was definitely one of the good guys. He will truly be missed by many. John was taken way too soon and a great loss to our family. May he continue to watch over his family. RIP
Patti Wimmer
We spent many Christmas eves with John and Mary and the family and few cruises too. WE will miss his quiet manner. RIP John, you fought a hard battle recently. Love Patti & Neal
Charles Kaczmarczyk
John fought for many years, and we should look at this as there is no end until absolutely nothing else can be done. His pursuit of finding a cure is something to be remembered by all. I am very proud to have known John and the time we spent together. May God bless and protect the Hainswoth family. Charles (Kaz), Tina, John, and David Kaczmarczyk.
Nancy A. Martin
John leaves a huge hole in our family quilt. From teenaged years hayrides, camping, concerts, and later to family events, beach vacations, holiday gatherings in his home, cruises, John was front and center. Taciturn but humorous, always reliable and generous with his time for family friends are my first thoughts when remembering John; the needs of my sister and their children always came first. Men are not made like him anymore. Jim & I grieve for all of you.
Joyce Rogers
Mary and Family .. Thinking of you at this time. You and John were great neighbors for many years .. lots of memories with our boys. Sending our thoughts and prayers.
Jamie and Joyce Rogers
Diane
I am so very sorry . John was the most pleasant person that I enjoyed seeing in the office . He will be missed . My heartfelt condolence’s and hugs of comfort. Diane
Karen Johnstone
Many thoughts and prayers to Mary and family. Heaven is full of our beautiful angels may they all watch over us.
Anita Mokienko
Dear Mary and family,
I did not know John very well, but I knew he loved his family was loved by everyone who knew him. I’m so sorry for all of your losses. You will always be in my thoughts and prayers.
Donna
So sorry for your lost . I send you my prayers and condolences. God has rest his soul. God will be with you through these hard times. ❤️❤️❤️
Carol logan
My god walk with you a your right now Mary and your family. Love u my old friend. I’m hear if need me
Doreen whelan
May the Good Lord put his loving Healing hands on all of you at this time 🙏🏼❤️🙏🏼.Reflect on all the GOOD THINGS AND FUN TIMES you all had together.Im here if you need anything 💕
Steve Griffith
So sorry for the loss of John. Prayers are with family and friends . I First met John when I was seven years old he was my neighbor. Our families camped and traveled together. We have had so many adventures together in our younger years. John was a great person and will be truly missed by many.RIP
Bonnie Hastings-Strong
Mary , I’m so sorry sending prayers to you and your loved ones. I’m praying for you all
David Bartz
Our heart goes out to John’s family. He will surely be missed. Our love and prayers are with you all. 🙏
Joan Gentile
John and I send our sincere condolences. John was a wonderful presence around our boys as they grew up in New Castle Little League. We will remember all the good times and we will keep you all in our prayers.
Bette Crystal
May Johnny be Resting in Peace with our Lord and Savior! I’m confident that he is watching over his family as he has always done! Miss and love him terribly already! Love and prayers! Aunt Bette
Jacqueline Dwyer
My DEEPEST HEARTFELT CONDOLENCES 💞🙏🏻🪽