John T. Onderko Obituary

We are sad to announce that on February 18, 2025, at the age of 88, John T. Onderko of Kresgeville, Pennsylvania passed away. Family and friends are welcome to leave their condolences on this memorial page and share them with the family.

He was predeceased by: his parents, Michael Onderko and Elizabeth Onderko (Mihalik); his wife Shirley Onderko (Mondero); his siblings, Thomas Onderko (Rosemary), Michael Onderko (Rosemary) and Dorothy Kusmider (Joseph); and his brother-in-law Herbert Youngkins.

He is survived by: his sons, Michael Onderko (Alicia) of Leola, PA and David Onderko (Bridgette) of Hillsborough, NJ.; his grandchildren, Justin Onderko (Kelly), Dana Heimerl (Josef), Gregory Onderko, Caroline Onderko and William Barry (Dana); and his siblings, Donald Onderko of Drums, PA and Elizabeth Youngkins of Allentown, PA. He is also survived by several nieces and nephews.

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