John M. Mayfield Jr.

John M. Mayfield Jr., a devoted husband, father, grandfather, great-grandfather, accomplished businessman, and philanthropist, passed away at home in his sleep on October 13, 2024. Born in Nowata, Oklahoma, and later, moving with his family to start a sawmill on Orr Springs Road in Ukiah, John attended a one room grade school there and later graduated from Ukiah High School. John’s journey spanned many roles—from entrepreneur and political leader to conservation advocate and mentor.

John’s career was marked by significant achievements across various industries and organizations, including manufacturing, consulting, and government service. After earning a BA in Business with a minor in Forestry from Humboldt State College in 1958, he embarked on a diverse career that included serving as Vice President and later President and owner of Microphor Inc., a manufacturing company specializing in water saving toilets and sewage treatment equipment for the railroad, commercial and marine industries worldwide. He successfully operated Microphor for about 30 years, guiding the company to international success. Later John was President of NTech Industries, Inc. a high tech company whose products included WeedSeeker sensors which are still in use today helping reduce chemical use in the agricultural industry.

John’s leadership extended beyond business. At just 27, he became the youngest elected member of the Mendocino County Board of Supervisors, marking a significant early milestone in his public service career. This role led him to work with then Governor Ronald Reagan in the Department of Conservation in Sacramento, reflecting his lifelong commitment to reasonable regulation and community development.

A founding member of several local organizations, including the Employers Council of Mendocino County and Leadership Mendocino, John championed civic engagement and economic development. His philanthropic endeavors included the John and Sandra Mayfield Family Economic Development Fund and the Sandra Westman Mayfield Vocational Scholarship Fund, which embody his dedication to supporting future generations.

John received numerous honors, including recognition from the North Coast Builders Exchange for Superior Service and knighthood from the International Order of St. Hubertus. His approach to life was shaped by his father’s advice: “If you never try, you'll never know,” and he attributed his success to his open-mindedness and commitment to making a difference.

John enjoyed traveling the world to several countries with his wife, hunting and shooting in Potter Valley with his children and grandchildren, and giving sage advice to those who sought him out. 

He is survived by his beloved wife, Sandy Mayfield; his children, Jim Mayfield, Ted Mayfield, and Susan Hewitt; siblings, Leah Ford, Marcia Root, Joe Mayfield and a legacy of grandchildren and great-grandchildren. He is also remembered by countless extended family members, colleagues, friends, and mentees.

A private graveside service was held on October 17, with a public memorial planned for November 16th, 2024, 1:30-4:00 pm at Barra of Mendocino, 7051 N State St., Redwood Valley, CA. In lieu of flowers, the family requests donations to Hospice of Ukiah or The Community Foundation of Mendocino County, reflecting John’s lifelong dedication to service and community.