1846 United States elections
|Incumbent president||James K. Polk (Democratic)|
|Overall control||Democratic Hold|
|Seats contested||19 of 58 seats|
|Net seat change||Democratic +2|
|Overall control||Whig Gain|
|Seats contested||All 230 voting seats|
|Net seat change||Whig +17|
The 1846 United States elections occurred in the middle of Democratic President James Polk's term, during the Second Party System. The election took place during the Mexican–American War. Members of the 30th United States Congress were chosen in this election. Wisconsin joined the union during the 30th Congress. Democrats kept control of the Senate, but lost control of the House.
- Not counting special elections.
- Congressional seat gain figures only reflect the results of the regularly-scheduled elections, and do not take special elections into account.
- "Party Divisions of the House of Representatives". United States House of Representatives. Retrieved 25 June 2014.
- "Party Division in the Senate, 1789-Present". United States Senate. Retrieved 25 June 2014.
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