One of southern Illinois's most Republican-leaning counties by margin
Jefferson County's R+47.7 margin in 2024 reflects the broader partisan shift that has reshaped rural southern Illinois over the past two decades, leaving it among the state's most lopsided counties despite a mid-sized population near 40,000.
Contextual statewide polling for Illinois. County pages stay rooted in county returns, but live statewide polling helps frame the current cycle.