Peter M. Gagnon Sr, 64, a resident of Newton, NH died on Saturday, December 6, 2025, surrounded by his family at Exeter Hospital in Exeter, NH. He was the beloved husband of Donna (Bourassa) Gagnon with whom he shared forty-two years of marriage.

He was born in Methuen, MA on June 26, 1961, and was the son of the late Andre and Silvia (Gosselin) Gagnon. Peter was raised and educated in Methuen, MA and was a graduate of Methuen High School, Class of 1979. He had a great passion for cars that he shared with his son Chris and was a successful self-employed auto mechanic who inspired his children to work hard. Peter enjoyed collecting coins and spending time with his grandchildren. He was a devoted husband, father, brother and grandfather. He will be dearly missed.

Besides his wife, Peter is survived by his children Kerri Beltran and her husband Shawn of Northwood, NH, Peter Gagnon Jr of Newton, NH, Christopher Gagnon of Newton, NH, and Karen Grover of Northwood, NH, his grandchildren Maddison Beltran, Zander Beltran, Kadence Gagnon, Monika Grover, and Andre Grover, his brother Andy Gagnon and his wife Sharon Gagnon, Judi Gagnon, Paula Gagnon, and Brenda Gioia.

He was sadly predeceased by his sister Mary Gagnon and son-in-law Timothy Grover.

There will be a celebration of life at a later date.