John A. Lassey

1944 - 2025

John A. Lassey

Concord, NH - John Anthony Lassey June 8, 1944 – July 20, 2025 John Anthony Lassey, aged 81, passed away peacefully on July 20, 2025, in Concord, New Hampshire after a long battle with cancer. Born in Phoenix, Arizona, John graduated from the University of Idaho in 1962 with a degree in Business. Shortly after, he served honorably as an officer in the U.S. Army, stationed in Schwäbisch Hall, Germany, where he met and married the love of his life - Kathleen Sullivan Lassey.

Following his military service, John returned to Great Falls, Montana, to support the family business. In 1975, he relocated his family to New Hampshire, where he pursued a law degree at Franklin Pierce Law School (now UNH Law School), launching a distinguished legal career that spanned four decades.

Throughout his life, John held a variety of roles - soldier, rancher, businessman, attorney, mediator, and dedicated public servant as the town moderator for Deering, New Hampshire. In every capacity, he was guided by unwavering dedication to reason, integrity, justice, and civil discourse. His deep interest in military and political history, as well as genealogy, enriched both his professional and personal life.

In his later years, John took great pride in facilitating presentations for the "World Concerns" group at Havenwood Heritage Heights, his retirement community, sharing his wisdom and passion with those around him.

John is survived by his beloved wife of 58 years, Kathleen Sullivan Lassey, to whom he was incredibly devoted; his three children, Karen Lassey of Troy, NY, Brian Lassey of Salisbury, MD, and Peter Lassey of Kennebunk, ME; eight grandchildren, Matthew Lassey-McCoy, Sean Geary, Bridget Geary, Elizabeth Lassey, Ace Lassey, Rebecca Lassey-Ryan, Samantha Lassey, and Carly Lassey; and his great-grandson Henry Geary. He also leaves behind four siblings: Stephen Lassey, Jeanne Arana, Susan LeSueur, and Marcia Clark, as well as numerous friends and colleagues.

John's commitment to the rule of law and thoughtful dialogue left a lasting impact on his family, community, and all who knew him. He developed a strong belief in the importance of civics education as the foundation for a healthy democracy. In his memory, donations may be made to either the New Hampshire Institute for Civics Education or the Sandra Day O'Connor Institute for American Democracy.