He married Florence Alyse Roha and they had two children, William K. Reid, Jr., and Robert L. Reid.
He began study for the Holy Orders in 1948, under a special seminary for older men, by the Bishop of Erie and the Examining Chaplains. He was ordained as Deacon on November 12, 1950, and was ordained as priest, at the Church of the Epiphany of Grove City, under Bishop Sawyer on September 19th, 1951. He transferred to the Northwestern Pennsylvania Diocese on May 24th, 1952.
Reverend Reid became the rector of St. James in 1955, serving faithfully until February 2, 1962. He transferred to the Diocese of Maine after leaving St. James. He served at St. Alban's, in Cape Elizabeth, a parish located southwest from Portland, Maine, from 1962-1968. From 1968 until he retired in 1972, he served at St. George's in York Harbor, which is a coastal town located near New Hampshire.
He later returned to the area, living in Meadville, Pennsylvania until he passed away in the fall of 1987.