John D. MacMillan, 64, of Gardner, passed peacefully on Monday, April 13, 2026, while at home, after a brief illness.

John was born in Fitchburg on January 19, 1962, he was the son of the late John and Rita (LeBlanc) MacMillan. John attended St Anthony's Elementary School of Fitchburg and was a graduate of Montachusett Regional Technical High School, Class of 1980, where he studied Information Technology. John was employed by Tucker Housewares in Leominster for 17 years and 15 years at Techmar Communications of Canton Ma. Later, John went on to dedicate many years of his career as an Information Technology Consultant.

John was a former member of Holy Spirit Church in Gardner. He enjoyed watching sports, especially the New England Patriots. There wasn't a Sunday went by that John and his family didn't spend time watching the Patriot's games together. He loved working in his yard and taking on projects to improve his home. He had a deep appreciation for music, attending many concerts over the years, with a particular fondness for classic rock bands such as Lynyrd Skynyrd and Journey. Above all, John cherished the time he spent with his family, holding those moments closest to his heart.

John is survived by his beloved wife, Cynthia (McPhee) MacMillan, of Gardner; three sons, John MacMillan of Gardner, James MacMillan and his husband Nevin, of Los Angeles, Timothy MacMillan and his wife Margaret, of Baldwinville; and a grand puppy, Reese; two brothers, Scott MacMillan and his wife Dorhina, of Worcester, and Shawn MacMillan of Westminster; a sister, Kelly Valiton and her husband Steve, of Westminster; John is also survived by several nieces, nephews, cousins, aunts, and uncles.

Calling Hours will be held Wednesday, April 22, 2026, from 5:00 p.m. to 7:00 p.m. in the Boucher Funeral Home, Inc., 110 Nichols Street, Gardner, MA.

A period of visitation will be held on Thursday, April 23, 2026, from 9:45 a.m. to 10:00 a.m., followed by a service at 10:00 a.m. in the funeral home. Burial will follow in St. John's Cemetery, West Street, Gardner, MA.

In addition of flowers, memorial contributions may be made to the National Kidney Foundation, 30 East 33rd Street, New York, NY 10016 or on their website at www.kidney.org. Please reference in memory of John D. MacMillan.