Dennis J. Quinn, 73, of Sioux City, IA, passed away Friday, December 16, 2022 at St. Luke's Hospital in Sioux City after a brief illness. A Memorial Service will be at 6:00 p.m., Thursday, December 22, 2022 at Meyer Brothers Colonial Chapel in Sioux City. A visitation will start at 4:00 p.m. until the time of the service. Dennis was born on March 7, 1949 in Jersey City, New Jersey, the second of six children of James Patrick Quinn and Mary Marcella McNamara. The family relocated to Denver, where Dennis grew up and attended George Washington High School. He voluntarily enlisted in the Army and proudly served in Vietnam from 1967 to 1968. He was a police officer in Colorado before moving to Sioux City, where he worked for R&R Recycling. He retired from the Sioux City Community School District transportation department in 2019. He married Kathleen Kelly in 1972 and they had three children. They later divorced and remained lifelong friends. In 1997 his son, Kelly, pitched a no hitter for the Heelan Crusaders Baseball team. Dennis profusely bragged about it for the next 25 years and we truly believe he will continue bragging about it in heaven. He was a devoted and proud father and grandfather. Dennis loved watching his beloved Denver Broncos. (Just not this season…or the last 7.) He also enthusiastically texted with his grandson daily about their favorite baseball team, the L.A. Dodgers. He was once the Sioux City “Irishman of the Year” and was a coordinator of the Sioux City St. Patrick's Day Parade. He enjoyed seeing his friends at the Siouxland Y and various Happy Hours over the years, including Bob Roe’s Point After, Soo-Z’s Saloon, the Firehouse, and Marty’s Tap. He had a great sense of humor and a razor sharp wit, and could always make you laugh. When he laughed, tears ran down his face. Dennis is survived by his daughter, Shannon, of Sioux City, sons Dennis Jr. (Emily) of Chicago and Kelly (Nickie) of Sioux City; a brother, James Quinn, and sisters Pattie Quinn, Karen (Rich) Gravina and Maureen (Mark) Orcholski, all of the Denver area; five grandchildren: Auden, Cash, Cora, Irelynn and Lyla Quinn; and many nieces and nephews. He was preceded in death by his parents and brother, Kevin Quinn. Honorary pallbearers are his close friends Frank Davis, Jim Kelly, Roger Jensen and Curt Paulson.