| Election Name: | 1804 United States House of Representatives election in Delaware |
| Country: | Delaware |
| Type: | presidential |
| Ongoing: | No |
| Previous Election: | 1802 United States House of Representatives election in Delaware |
| Previous Year: | 1802 |
| Next Election: | 1805 Delaware's at-large congressional district special election |
| Next Year: | 1805 |
| Election Date: | October 13–20, 1804 |
| Image1: | BayardJames ASr.jpg |
| Nominee1: | James A. Bayard Sr. |
| Party1: | Federalist Party |
| Popular Vote1: | 4,398 |
| Percentage1: | 52.12% |
| Nominee2: | Caesar Augustus Rodney |
| Party2: | Democratic-Republican Party |
| Popular Vote2: | 4,040 |
| Percentage2: | 47.88% |
| U.S. Representative | |
| Before Election: | Caesar Augustus Rodney |
| Before Party: | Democratic-Republican Party |
| After Election: | James A. Bayard Sr. |
| After Party: | Federalist Party |
The 1804 United States House of Representatives election in Delaware was held October 13–20, 1804. The incumbent Representative Caesar Augustus Rodney was defeated by the former Representative James A. Bayard Sr., whom he had defeated in the previous election, with 52.12% of the vote.
| County | Bayard# | Bayard% | Rodney# | Rodney% | Total votes cast | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Kent | 1,374 | 57.47% | 1,017 | 42.53% | 2,391 | ||||||
| New Castle | 902 | 31.40% | 1,971 | 68.60% | 2,873 | ||||||
| Sussex | 2,122 | 66.86% | 1,052 | 33.14% | 3,174 | ||||||
| Totals | 4,398 | 50.11% | 4,040 | 47.88% | 8,438 |