Mary Jo Reid, age 90, of Buffalo Grove, passed away Thursday, February 5, 2026, at her home. She was born August 4, 1935, in South Bend, Indiana to Alexander Phillip and Edith nee Mills Weihrouch. Devoted wife of the late William "Bill" Reid. Loving mother of Beth (Rick Caral) Reid, the late David B. Reid, and the late Douglas B. (Charla) Reid. Adoring grandmother of Samuel (Tessa) Reid and David (Rachel) Reid. Caring great-grandmother of William and Charlotte Reid. Mary Jo was active on the Village of Buffalo Grove planning committee. She spent eight years on the School District 21 Board of Education. A graduate of Northern Illinois University she and a member of the American Association of University Women. Mary Jo also worked more than a decade for the Illinois State Scholarship Commission. She was a charter member of Kingswood United Methodist Church in Buffalo Grove, helping to start the church and then providing critical leadership as a Sunday School teacher, member of the United Methodist Women and Susanne Wesley Circle, Knopf Cemetery board and so much more. The funeral service will be 11:00 a.m. on Tuesday, February 10, 2026, at Kingswood United Methodist Church, 401 W. Dundee Road, Buffalo Grove, IL 60089. Interment will be in Wheeling Township Cemetery, Arlington Heights, IL. In lieu of flowers donations to Kingswood United Methodist Church are greatly appreciated. For those wishing to share a condolence or photo for Mary Jo's family, please visit funerals.pro. For information, call 847-537-6600.