| Election Name: | 1985 United States House of Representatives elections |
| Country: | United States |
| Flag Year: | 1960 |
| Type: | legislative |
| Ongoing: | no |
| Previous Election: | 1984 United States House of Representatives elections |
| Previous Year: | 1984 |
| Next Election: | 1986 United States House of Representatives elections |
| Next Year: | 1986 |
| Majority Seats: | 218 |
| Election Date: | March 30, 1985 – August 3, 1985 |
| 1Blank: | Seats up |
| 2Blank: | Races won |
| Party1: | Democratic Party (US) |
| Image1: | SpeakerO'Neill.jpg |
| Leader Since1: | January 4, 1977 |
| Last Election1: | 253 seats |
| 1Data1: | 2 |
| 2Data1: | 2 |
| Party2: | Republican Party (US) |
| Leader Since2: | January 3, 1981 |
| Last Election2: | 182 seats |
| 1Data2: | 0 |
| 2Data2: | 0 |
There were two elections to the United States House of Representatives to serve in the 99th United States Congress.
Elections are listed by date and district.
|-! | Gillis William Long| | Democratic| 1962| | Incumbent died January 20, 1985.
New member (see Widow's succession) elected March 30, 1985.
Democratic hold.| nowrap |
|-! | Sam B. Hall| | Democratic| 1976 | | Incumbent resigned May 27, 1985 to become a U.S. District Judge.
New member elected August 3, 1985.
Democratic hold.| nowrap |
|}