William Bradshaw Egan (September 28, 1808 – October 27, 1860), sometimes Eagan, was an Irish American physician, politician, and orator. Born in Killarney, Egan trained in the United Kingdom before immigrating to North America to teach school. He later studied in New York City, New York, then ventured west to the burgeoning city of Chicago, Illinois. As one of the first trained physicians in the city, Egan rose to prominence, serving on the first board of health and serving in the Illinois House of Representatives.