Dennis J. Sandheinrich, age 92, of O'Fallon, Ill., born April 14, 1933 in Fayetteville Township to Anton G.  and Agnes M., nee Lehmkuhl, Sandheinrich, died Saturday, July 12, 2025 at EverVella Care Center in Swansea, Ill.
Dennis grew up attending St. Liborius Catholic Church where he served as an altar boy. Although not an 'AVID' sports fan, he routinely cheered on the local sports teams. He was a member of the American Legion (honored for 60+ years) in St. Libory, and an active member of the O'Fallon Knights of Columbus for many years. In retirement, he drove for Meals on Wheels, and supported the Society of St. Vincent de Paul. He was a member of the Metro East Polka Club and loved playing cards, especially pinochle and poker. If you ask those who knew him, they would say Dennis was a "one of a kind" type person who would do anything for anyone.

He attended Marissa High school, graduating in 1951. He served in the Army from May 1951 to May 1953 during the Korean Conflict. After serving in the Army, Dennis worked for 32 years as a meat cutter at Swift Meat Packing plant in National City (East St. Louis) and 10 years as a custodian at O'Fallon Township High School.

He was preceded in death by his wife of 45 years, Charlotte (nee Prange), daughter Sharon, son Steven, parents Anton and Agnes, brothers and sisters Otto (Dolores) Sandheinrich, Adele (Harry) Wilson, Roy (Vera) Sandheinrich, Leo (Ima Jean) Sandheinrich, Anthony "Tony, Jr.", nieces and nephews.

He is survived by a daughter Michelle and a son Michael, brother-in-law (although more like a brother) Robert (Bonnie) Prange, several nieces, nephews and godchildren.

In lieu of flowers, memorial donations are suggested to either St. Clare School or St. Clare Church. Online photo tribute and guest book are available at www.wfh-ofallon.com .

Visitation: 4-7 pm, Wednesday, July 16, 2025 at St. Clare Catholic Church, with the Rosary being prayed at 6:45 pm. Visitation will continue at 9 a.m. Thursday prior to the funeral service.

Mass of Christian Burial will be celebrated at 10 am, Thursday, July 17, 2025 at St. Clare Catholic Church, with Rev. Jim Deiters presiding. Burial will follow at Mount Calvary Catholic Cemetery, Shiloh, Ill.

Wolfersberger Funeral Home, O'Fallon, is serving the family.