| Country: | Northern Territory |
| Type: | parliamentary |
| Ongoing: | no |
| Election Date: | 15 December 1984 |
| Party1: | Country Liberal Party |
| Popular Vote1: | 1,059 |
| Percentage1: | 54.9% |
| Swing1: | 16.9 |
| Candidate2: | Barry Cavanagh |
| Party2: | Australian Labor Party (Northern Territory Branch) |
| Popular Vote2: | 869 |
| Percentage2: | 45.1% |
| Swing2: | 16.9 |
| MP | |
| Before Party: | Country Liberal Party |
| After Party: | Country Liberal Party |
A by-election for the seat of Jingili in the Northern Territory Legislative Assembly was held on 15 December 1984. The by-election was triggered by the resignation of CLP Chief Minister Paul Everingham to seek election to the Federal House of Representatives. The seat of Jingili had been held by Everingham since its creation in 1974.