Dr. David Gill grew up in Niles, IL. His father died at age 37, so David went to work washing dishes and busing tables in a restaurant at age 13. He worked his way through both college and medical school in Champaign-Urbana, stocking shelves in a department store and mopping the floors of a laundromat. He completed residency training in Family Practice in Iowa, and after several years as a family physician, he switched over to full-time practice in Emergency Medicine in 1996. He is Board-certified in both Family Practice and Emergency Medicine.

Dr. Gill is a 20-year member of the Physicians for a National Health Program, an organization of 20,000 doctors which advocates for an Improved Medicare for All program. He has done volunteer work with Big Brothers/Big Sisters, The Salvation Army, and Peace Meals. He is a longtime member of Physicians for Reproductive Health.

David ran in IL-13 once before; in 2012, he lost by 0.3 %.

Dr. Gill refuses all funding from corporations and Wall Street banks.

He and his wife, Elaine, reside in Bloomington; they have six children, two dogs rescued from animal control, and two cats.