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
General Election Polling Trend
Showing the published average. The rating above uses this figure.
PollingSource average — the last three qualifying polls of the locked matchup, or fewer (no polls in the last 30 days). This is an average, not a forecast.
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General Election Polling Average
No scientific polls in the last 30 days — the figure is the last three qualifying polls of the locked matchup, or fewer when fewer exist, not a 30-day mean. The table lists the polls in that average, plus 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
Who is winning the 2026 IL-04 House race?
Patty Garcia leads Lupe Castillo 34% to 15% in the PollingSource polling average — a D+19.0 margin based on the last three qualifying polls of the locked matchup, or fewer (no polls in the last 30 days).
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 on this page is the last three qualifying scientific public polls of the locked matchup, or fewer — the newest of them is older than 30 days, so this is not a 30-day mean and it does not set the rating. We do not exclude pollsters. Full details: pollingsource.com/methodology.
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