Aggregate of all polls released for Illinois's 4th congressional district House election between Democrat Patty Garcia and Republican Lupe Castillo. This page will update the moment new polls are released, including the polling average, projected margin, and survey details.
2026 Illinois 4th district House Polling Average
Patty Garcia leads Lupe Castillo by 19.0% in the Pollsmax polling average for the 2026 Illinois 4th district House election, 34.0% to 15.0%. The average currently aggregates results from 1 poll. According to the latest Illinois 4th district House poll, conducted by The Bullfinch Group on August 3, Garcia leads Castillo 34% to 15%.
Democrat
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Weighted polling average
Republican
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Weighted polling average
Net margin
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Polling average difference
Polls Included
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Number of polls conducted
Pollsmax creates a time-weighted and partisanship-adjusted polling average from an aggregate of all polls conducted for the general election. See the polling methodology to learn more about how polls are standardized and weighted.