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Illinois 4 House race

Updated October 8, 2026 · 26 days until the November 3 election

Patty Garcia (D) and Lupe Castillo (R) are running for the House seat in Illinois 4. Across 1 poll, the Frothier average has Patty Garcia at 34.0% and Lupe Castillo at 15.0%, which is Garcia +19.0. That gives Patty Garcia a 98% chance of winning, and the race is rated Safe D.

Rating
Safe D
Set by the win estimate
Chance of winning
98%
Patty Garcia (D)
Polling average
Garcia +19.0
1 poll, newest Aug 3
Frothier estimate
Garcia +19.0
Give or take 9.1 points

Where the race stands

Patty GarciaDemocrat
34.0%
Lupe CastilloRepublican
15.0%
Ed Hersheyother
4.0%
Chris Gettyother
9.0%
Chance of winning
Garcia 98%Castillo 2%

How the polls have moved

The polling average over the last four months. Above the middle line Garcia leads; below it Castillo leads.

D+24EvenR+24Aug 5Sep 30

Recent polls

Newest first. Polls paid for by a party or a campaign are tagged and count for half in the average.

PollsterEndedSampleGarcia (D)Castillo (R)Margin
The Bullfinch Group Aug 3653 RV 34.015.0Garcia +19.0

How this estimate is made

Every general-election poll goes into one weighted average: newer, larger and likely-voter polls count for more, and no single pollster can flood it. House district estimates use polls alone, so they carry more uncertainty than statewide races. A win estimate is a probability, not a call: a candidate with a 70 percent chance loses three times in ten. Full method and sources.

Poll data from The New York Times poll database, CC BY 4.0, via PollResults.org. Averages, ratings and projections are Frothier calculations.

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