Illinois’s 11th Congressional District: 2026 House Race
Illinois’s 11th Congressional District, anchored in the western Chicago suburbs and Fox Valley, heads to voters in November 2026 to elect its U.S. House representative. The seat has leaned Democratic in recent cycles, making the general election the key contest to watch. Candidates from both major parties will compete to represent the district for a two-year term.
Why Markets Are Watching
Control of the U.S. House hinges on the cumulative outcome of races like this one, where district demographics and incumbency shape the national balance of power. Suburban Chicago voters’ choices often reflect broader shifts in how swing-adjacent districts respond to economic conditions and party messaging. The result will help determine which party sets the legislative agenda in Washington.
How Prediction Markets Frame the Race
The contract reduces a multi-candidate campaign to a binary question: will the Democratic or Republican nominee win IL-11? That framing isolates partisan control of the seat rather than vote share or margin. Traders are effectively weighing district partisanship, candidate strength, and national political winds heading into the 2026 midterms, distilling months of campaigning into a single outcome to track.
Related terms
Total Volume
$36.1k
Kalshi $1.4k · Polymarket $34.6k
Leading Market
Bill Foster
Kalshi 96% · Polymarket 97%
Bill Foster Volume
$2.4k
Kalshi $334.42 · Polymarket $2k
Bill Foster 24h Change
+0.30%
Kalshi +0.30% · Polymarket 0.00%
Calculate Your Potential Return
- Kalshi(opens in a new tab) 7.0% fee
- Polymarket(opens in a new tab) 5.0% fee
| Market | Kalshi Yes | Kalshi Fee | Kalshi Payout | Polymarket Yes | Polymarket Fee | Polymarket Payout |
|---|---|---|---|---|---|---|
| Bill FosterDemocratic Party | 97.9¢ | 7.0% | , trade Bill Foster on Kalshi (opens in a new tab) | 97.0¢ | 5% | , trade Bill Foster on Polymarket (opens in a new tab) |
| Jeff WalterRepublican Party | 4.4¢ | 7.0% | , trade Jeff Walter on Kalshi (opens in a new tab) | 4.0¢ | 5% | , trade Jeff Walter on Polymarket (opens in a new tab) |
* Estimates if candidate wins. Actual returns may vary.
All Markets
| Market | Total Volume | Kalshi(opens in a new tab) | Polymarket(opens in a new tab) |
|---|---|---|---|
| Bill FosterDemocratic Party | $2,369.25 | ||
| Jeff WalterRepublican Party | $33,694.21 |