Will the US officially declare war on Iran by December 31, 2026?
As of September 3, 2026, the market gives “Will the US officially declare war on Iran by December 31, 2026?” a 97% chance of NO.
| YES odds | 3% |
|---|---|
| NO odds | 97% |
| Volume | $835,217 |
| Closes | January 1, 2027 |
Updated September 3, 2026 · Live data from Polymarket
About this market
Recent US airstrikes on Iranian military targets in early September 2026, followed by Iranian missile and drone responses against regional US positions, have renewed escalation fears in the ongoing intermittent conflict over Strait of Hormuz shipping access. President Trump has warned of stronger follow-on strikes if Tehran retaliates further while emphasizing economic pressure and naval control rather than open war, and Iranian officials have urged adherence to a suspended June memorandum of understanding. Both sides have described the exchanges as contained despite civilian casualties and threats of expanded operations. These developments, alongside stalled negotiations and domestic political considerations ahead of November congressional elections, shape trader assessments of the low likelihood of a formal congressional declaration of war in the near term.