Massachusetts 5th District House Race 2026
Massachusetts’s 5th Congressional District, covering communities west and northwest of Boston including Framingham and Concord, will elect a representative to the U.S. House in 2026. The district has reliably favored Democrats in recent cycles, but every midterm contest draws fresh scrutiny of turnout and candidate strength. Primary contests and candidate filings will shape the field before the general election.
Why Markets Are Watching
Control of the U.S. House hinges on the cumulative outcome of races like this one, making even lopsided districts relevant to the national balance of power. A strong Democratic showing here could signal broader momentum heading into the midterms, while any unexpected competitiveness would raise questions about shifting suburban voter sentiment in Massachusetts.
How Prediction Markets Frame the Race
The core question is simple: which party ultimately holds the seat once votes are certified. Traders are effectively weighing the durability of the district’s partisan lean against the possibility of a surprise primary upset or late shift in voter enthusiasm. Separate contracts tied to individual named candidates let the market isolate not just party control but which specific person emerges from a crowded field.
Related terms
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Democratic Party (United States) -
Republican Party (United States) -
Massachusetts -
Boston -
Katherine Clark -
Framingham, Massachusetts -
Massachusetts's 5th congressional district -
Concord, Massachusetts
Total Volume
$117.2k
Kalshi $1.7k · Polymarket $115.5k
Leading Market
Katherine Clark
Kalshi 96% · Polymarket 98%
Katherine Clark Volume
$14.6k
Kalshi $498.21 · Polymarket $14.1k
Katherine Clark 24h Change
-3.00%
Kalshi 0.00% · Polymarket -3.00%
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 |
|---|---|---|---|---|---|---|
| Katherine ClarkDemocratic Party | 99.3¢ | 7.0% | , trade Katherine Clark on Kalshi (opens in a new tab) | 99.0¢ | 5% | , trade Katherine Clark on Polymarket (opens in a new tab) |
| Republican Party | 1.9¢ | 7.0% | , trade Republican Party on Kalshi (opens in a new tab) | 2.0¢ | 5% | , trade Republican Party 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) |
|---|---|---|---|
| Katherine ClarkDemocratic Party | $14,610.46 | ||
| Republican Party | $102,582.21 |