Original: Dearborn County, Indiana, Dearborn, Michigan and Dearborn, Missouri were also named for him, as was Fort Dearborn in Chicago, which in turn was the namesake for Dearborn Street, a major street in downtown Chicago.
Simplified: Dearborn County, Indiana, Dearborn, Michigan and Dearborn, Missouri were also named for him, as was Fort Dearborn in Chicago, Illinois.