| 31st United States Congress | |
|---|---|
30th ← → 32nd | |
 United States Capitol (1846) | |
March 4, 1849 – March 4, 1851 | |
| Members | 62 senators 233 representatives 2 non-voting delegates |
| Senate majority | Democratic |
| Senate President | Millard Fillmore (W)[a] (until July 9, 1850) Vacant (from July 9, 1850) |
| House majority | Democratic (plurality) |
| House Speaker | Howell Cobb (CU) |
| Sessions | |
| Special[b]: March 5, 1849 – March 23, 1849 1st: December 3, 1849 – September 30, 1850 2nd: December 2, 1850 – March 4, 1851 | |
The 31st United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C., from March 4, 1849, to March 4, 1851, during the 16 months of the Zachary Taylor presidency and the first eight months of the administration of Millard Fillmore's. The apportionment of seats in this House of Representatives was based on the 1840 United States census. The Senate had a Democratic majority, while there was a Democratic plurality in the House.
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