Dingell was born in
Detroit,
Michigan, the son of Marie Ciesielski Opalewska and Joseph A. Dzięglewicz, who were Polish immigrants from
Bączal Górny. The family's surname ended up being
anglicized to 'Dingell'. A graduate of St. Casimir's Parochial School in Detroit, he worked as a newsboy, printer and newspaperman. He had also engaged in the construction of natural gas pipelines, was a wholesale dealer in beef and pork products and an organizer and trustee of
Colorado Springs Labor College. Dingell married Grace Blossom Bigler (1894–1962) and had four children:
John Jr., Patricia Ann, James, and Julè. Patricia Ann, known as Patsy, died shortly after her first birthday. Dingell established his family in Detroit, where he was employed as a printer at the Detroit Free Press and actively participated in labor union organizing. Dingell suffered from asthma and tuberculosis, which caused the family to briefly relocate to
Colorado Springs to seek
treatment there. There, John Jr. was born in 1926. == Political career ==