Ronald “Ron” Stuart Duncan, 91, a lifelong resident of Granby and Simsbury, CT, passed away peacefully on January 30, 2021. Son of the late Stuart and Jessica (Weiant) Duncan, he is survived by his beloved wife of 20 years Janet S. Duncan; two sons, Mark (Diane) and John Duncan; his grandchildren, Jacob, Michael, Matthew and Kyle Duncan; daughters by marriage, Pamela and Joanne; granddaughters, Heather and Marcy; and great grandchildren, Maddie, Blake Jr., and Anna. Having graduated from Williston Academy, he served in the United States Air Force for 4 years. He then attended the University of Vermont and Central Connecticut State University to earn his Master’s Degree in Education. Ron retired after teaching Industrial Arts for 31 years at King Philip Middle School in West Hartford. He is also survived by his sister-in-law, Placeda Hall and her three girls, Susan, Kelly, and Kerry, brother-in-law Britt Hall (Daisy), and nephew Shawn. He was predeceased by his sister Charlotte, wife Nancy (Hall) Duncan, brother-in-law Dr. Francis Hall, and niece Traci. A memorial service will be held at a later date. Donations in Ron’s memory may be made to Farmington Canal Heritage Trail or Granby Ambulance Association, 1 Pegville Rd., Granby, CT 06035. Hayes-Huling & Carmon Funeral Home of Granby has care of the arrangements.