John Mark Mann, age 58, of Delray Beach, FL, passed away on March 30, 2026. John was born on 11/29/1967 in Waukegan, Illinois to Barbara Jane Carden and Billy Gene Mann. 

Growing up, John attended Round Lake High School and enjoyed playing hard and competing with his brothers in various sports and activities. He had a close bond with all of his siblings. 

Throughout his life, John worked his way up from a plumbing helper to eventually owning his own plumbing business specializing in new construction and high-end remodels in South Florida. He was known for his hard work, dedication, and pride in his work. 

Outside of work, John loved all sports, in particular the Chicago Bears and the Chicago Bulls. He especially enjoyed riding his Harley Davidson, spending time with family, and doting on his best friend and daughter, Stephanie. 

John is survived by his daughter Stephanie Mann, mother Barbara Ley, stepfather Richard Ley, siblings Brian Mann, sister-in-law Diane Mann, Janet (Mann) Samec, brother-in-law Billy Samec, Diana Mann and Todd Mann, as well as many nieces, nephews and friends. 

He was preceded in death by his brother David Paul Mann and his father Billy Gene Mann. 

A celebration of life will be held on April 10, 2026 at 11:00 a.m. at Boynton Chapel, officiated by Kristine Thornton. 

In lieu of flowers, memorial contributions may be made to Shriners Children's Hospital and/or  Samaritan's Purse.