How Many Pennsylvania House Seats Will Democrats Win in 2026
Pennsylvania’s 17 U.S. House seats are up for grabs in the 2026 midterms, with Democrats aiming to defend and expand their current share of the delegation. The state’s mix of competitive suburban districts and closely watched swing seats makes it one of the clearest barometers of national political momentum. Redistricting and retirements could reshape several races before Election Day.
Why Markets Are Watching
Pennsylvania is a perennial battleground whose House results often foreshadow broader midterm trends. Control of swing districts here can signal shifts in suburban and working-class voter sentiment that extend well beyond the state. The outcome also carries weight for which party holds narrow margins in the U.S. House.
How Prediction Markets Frame the Outcome
This market isolates a specific numeric threshold rather than a simple win-or-lose outcome: how many of Pennsylvania’s seats Democrats will ultimately hold. That turns a statewide election into a range of discrete, tradeable brackets, from fewer than seven seats up to twelve or more. Traders are effectively weighing district-by-district competitiveness and aggregating it into a single seat-count distribution.
Related terms
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Democratic Party (United States) -
Redistricting -
Swing state -
Pennsylvania -
Swing (seat) -
Suburbanization
Total Volume
$81.7k
Kalshi $72.9k · Polymarket $8.8k
Leading Market
10
Kalshi 35% · Polymarket 33%
10 Volume
$8.2k
Kalshi $6.7k · Polymarket $1.6k
10 24h Change
+2.00%
Kalshi 0.00% · Polymarket +2.00%
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 |
|---|---|---|---|---|---|---|
| 10 | 35.0¢ | 7.0% | , trade 10 on Kalshi (opens in a new tab) | 33.0¢ | 5% | , trade 10 on Polymarket (opens in a new tab) |
| 11 | 35.0¢ | 7.0% | , trade 11 on Kalshi (opens in a new tab) | 35.0¢ | 5% | , trade 11 on Polymarket (opens in a new tab) |
| 9 | 16.0¢ | 7.0% | , trade 9 on Kalshi (opens in a new tab) | 19.0¢ | 5% | , trade 9 on Polymarket (opens in a new tab) |
| 8 | 6.0¢ | 7.0% | , trade 8 on Kalshi (opens in a new tab) | 4.0¢ | 5% | , trade 8 on Polymarket (opens in a new tab) |
| 12+ | — | — | — | 11.0¢ | 5% | , trade 12+ 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) |
|---|---|---|---|
| 10 | $8,245.12 | ||
| 11 | $19,157.14 | ||
| 9 | $6,247.38 | ||
| 8 | $5,797.10 | ||
| 12+ | $892.45 | No market |