In the most recent Illinois 4th congressional district poll (The Bullfinch Group, Jul 31 - Aug 3, 2026, n=653 RV), Garcia (Patty) (D) leads with 34%, followed by Castillo (R) at 15%, Getty (I) at 9% and Hershey at 4%.
Data is synced continuously from the New York Times, which aggregates surveys from major pollsters. The table shows individual pollster results. The map uses the same 2026 non-partisan polling average and candidate-selection method as the homepage maps.
At a glance
- Polls tracked
- 1
- Pollsters
- 1
- Field dates
- Aug 3, 2026 – Aug 3, 2026
- Stages
- General election (1)
- Most recent poll
- Aug 3, 2026
All polls
| Pollster | Partisan | Field dates | Stage | Sample | Results | Margin | Source |
|---|---|---|---|---|---|---|---|
| The Bullfinch Group | Jul 31 - Aug 3, 2026 | General election | n=653 RV | Don't know: 37% Garcia (Patty) (D): 34% Castillo (R): 15% | D+19% | link |
1 of 1 poll shown, most recent first. Every number is a single pollster's reported result — no polling average is calculated here. Partisan shows the source’s party flag; a blank means no partisan affiliation is marked.