| ← 1802 1803 1804 1805 1806 → Presidential election year | |
| Incumbent president | Thomas Jefferson (Democratic-Republican) |
|---|---|
| Next Congress | 9th |
| Presidential election | |
| Partisan control | Democratic-Republican hold |
| Electoral vote | |
| Thomas Jefferson (DR) | 162 |
| Charles C. Pinckney (F) | 14 |
 | |
| 1804 presidential election results. Green denotes states won by Jefferson, burnt orange denotes states won by Pinckney. Numbers indicate the number of electoral votes allotted to each state. | |
| Senate elections | |
| Overall control | Democratic-Republican hold |
| Seats contested | 11 of 34 seats[1] |
| Net seat change | Democratic-Republican +2[2] |
| House elections | |
| Overall control | Democratic-Republican hold |
| Seats contested | All 142 voting members |
| Net seat change | Democratic-Republican +11[2] |
| Gubernatorial elections | |
| Seats contested | 13 |
| Net seat change | +1 Federalist |
 | |
| 1804 gubernatorial election results Democratic-Republican gain Democratic-Republican hold Federalist gain Federalist hold | |
The 1804 United States elections elected the members of the 9th United States Congress. The election took place during the First Party System. The Democratic-Republican Party continued its control of the presidency and both houses of Congress.
In the presidential election, incumbent Democratic-Republican President Thomas Jefferson easily defeated Federalist former Governor Charles Pinckney of South Carolina.[3] As the Twelfth Amendment had been ratified in 1804, this was the first election in which electors separately selected a president and a vice president.
In the House, Democratic-Republicans won moderate gains, boosting their already-dominant majority.[4]
In the Senate, Democratic-Republicans made small gains, improving on their commanding majority.[5]