Primary
Democratic Primary
Held March 17, 2026.
| Candidate | Votes | % | |
|---|---|---|---|
| Patty Garcia ✓ | 52,616 | 100.0% |
Republican Primary
Held March 17, 2026.
| Candidate | Votes | % | |
|---|---|---|---|
| Lupe Castillo ✓ | 8,336 | 100.0% |
Full calendar and every race: Illinois primary guide
Race Overview
Candidates
Lupe Castillo Nominee
RepublicanAverage reflects all polls from the last 30 days; table shows the most recent 30 days or the newest 3 polls, whichever is more. How accurate is each pollster? →
| Pollster | Date | Sample | MoE | Dem | Rep |
|---|---|---|---|---|---|
| Independent Center Voice | 2026-08-01 | 653 RV | ±3.80 | Patty Garcia 34.00% | Lupe Castillo 15.00% |
Questions About This Race
Is the 2026 IL-04 House race competitive?
No — the expert consensus rates it Safe D for Democrats.
What does the latest poll of the 2026 IL-04 House race say?
The most recent public poll, from Independent Center Voice (completed August 1, 2026), found Patty Garcia (D) at 34% and Lupe Castillo (R) at 15%.
When is the 2026 IL-04 House race decided?
Election Day is Tuesday, November 3, 2026.
How is the PollingSource average calculated?
The PollingSource average is the unweighted mean of every scientific public poll of the race from the last 30 days — we do not exclude pollsters. Each race page lists the individual polls behind the average with pollster, field dates, sample size, and margin of error. Full details: pollingsource.com/methodology.
Race News
No news coverage yet for this race.