Dennis Warren Mastern, 83, of Lebanon, passed away on Saturday, March 28, 2026, at Otterbein Lebanon.

Born March 10, 1943, in Warren, Ohio, Dennis was the son of William and Nina (née Byers) Mastern. He was a proud 1961 graduate of Lebanon High School.

Dennis spent his career working as an independent sales representative, serving a variety of companies over the years. He was a member of Moose Lodge #501 and enjoyed spending time on the golf course, especially at Pleasant Hill Golf Course in Monroe. A devoted and lifelong fan of the Cincinnati Bengals, Dennis was there from the beginning—holding season tickets dating back to the team's early days at Nippert Stadium.

He was preceded in death by his parents and his daughter, Jena May Mastern.

Dennis is survived by his loving wife, Sandy (née Cornwell) Mastern; his children, Troy (Lisa) Mastern and Kara Mastern; his step-son, David (Judy) Lykins; his grandchildren, Joey McVicker, Jordan Mastern, Taylor Mastern, Jack Lykins, Jaden Glaser, and Jamie Liesse; and his great-grandchildren, Jeremiah Mastern, Max McVicker, Ruby Lovas, and Scarlett Lovas.

A celebration of Dennis's life will be held at a later date.

Arrangements are in the care of Oswald-Hoskins Funeral Home, Lebanon.