Mary Jo Krupka, 85 of Arlington Heights was born April 29, 1935 in Evanston to Harry and Alice (Tharp) Krahl and passed away surrounded by her family on March 4, 2021. Mary Jo was the beloved wife of Edward C. Krupka Jr.; loving mother of Carol (Douglas) Knott, Lori (John) Rapacz and Karla (John) Thompson; cherished grandmother of Emily, Katie, Dylan, Adam, Aaron, Alyssa, Sam and Lindsay. Mary Jo was preceded in death by her dear granddaughter Sarah and now is reunited with her in heaven. Visitation will be Monday, March 8, 2021 from 10:00 AM until the time of the Funeral Mass at 11:00 AM at Our Lady of the Wayside Church, 440 S. Mitchell Street, Arlington Heights. Interment will be private. In lieu of flowers, contributions to the Gloria Rebek Scholarship Fund c/o Our Lady of the Wayside School, 432 S. Mitchell Street, Arlington Heights, Il 60005 appreciated.