| Election Name: | 1800 United States House of Representatives election in Delaware |
| Country: | Delaware |
| Type: | presidential |
| Ongoing: | No |
| Previous Election: | 1798 United States House of Representatives election in Delaware |
| Previous Year: | 1798 |
| Next Election: | 1802 United States House of Representatives election in Delaware |
| Next Year: | 1802 |
| Election Date: | October 7, 1800 |
| Image1: | BayardJames ASr.jpg |
| Nominee1: | James A. Bayard Sr. |
| Party1: | Federalist Party |
| Popular Vote1: | 2,674 |
| Percentage1: | 53.33% |
| Nominee2: | John Patten |
| Party2: | Democratic-Republican Party |
| Popular Vote2: | 2,340 |
| Percentage2: | 46.67% |
| U.S. Representative | |
| Before Election: | James A. Bayard Sr. |
| Before Party: | Federalist Party |
| After Election: | James A. Bayard Sr. |
| After Party: | Federalist Party |
The 1800 United States House of Representatives election in Delaware was held on October 7, 1800. The incumbent Representative and House Minority Leader James A. Bayard Sr. won reelection and defeated the former Representative John Patten, who would die later that year.