| 18th United States Congress | |
|---|---|
17th ← → 19th | |
 United States Capitol (1827) | |
March 4, 1823 – March 4, 1825 | |
| Members | 48 senators 213 representatives 3 non-voting delegates |
| Senate majority | Democratic-Republican |
| Senate President | Daniel D. Tompkins (DR) |
| House majority | Democratic-Republican |
| House Speaker | Henry Clay (DR) |
| Sessions | |
| 1st: December 1, 1823 – May 27, 1824 2nd: December 6, 1824 – March 3, 1825 | |
The 18th 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, 1823, to March 4, 1825, during the seventh and eighth years of James Monroe's presidency. The apportionment of seats in the House of Representatives was based on the 1820 United States census. Both chambers had a Democratic-Republican majority.