Rockford anchors a county that has swung within single digits for a decade
Home to Rockford, Illinois's third-largest city, Winnebago County shifted from reliably Republican to a genuine battleground as its mid-sized industrial economy restructured and its suburban precincts trended more competitive through the 2010s and 2020s.
Contextual statewide polling for Illinois. County pages stay rooted in county returns, but live statewide polling helps frame the current cycle.