Official results for the 1984 Arunachal Pradesh Legislative Assembly election. INC won the most seats with 21 out of 30.
Total seats: 30. Majority mark: 15.
| Party | Seats | Vote Share |
|---|---|---|
| INC | 21 | 43.1% |
| PPA | 4 | 15.5% |
| IND | 4 | 33.3% |
| BJP | 1 | 7.7% |
| JP | 0 | 0.4% |
| Constituency | Winner | Party | Margin % |
|---|---|---|---|
| ALONG WEST | HEJAM PONGLAHAM | INC | 9.5% |
| BAMENG | TADAR TANG | INC | 5.4% |
| BASAR | NOKSONG BOHAM | INC | 28.0% |
| BOMDILA | CHERA TALO | INC | NaN% |
| CHAYANG TAJO | TECHI TAKUR | INC | 16.4% |
| DAPORIJO | KHAPRISO KRONG | INC | 9.6% |
| DIRANG | Shri Japu Deru | PPA | 3.0% |
| DOIMUKH | TADIK CHIJE | IND | 4.3% |
| DUMPORIJO | TENGAM NGEMU | INC | 8.4% |
| ITANAGAR | PUNJI MARA | INC | 8.1% |
| KALAKTANG | NYARI WELLI | INC | 0.4% |
| KOLORIANG | TADE TACHO | INC | 21.3% |
| LIKABALI | KAPCHEN RAJKUMAR | INC | 7.3% |
| LIROMOBA | T.L.RAJ KUMAR | INC | 18.9% |
| LUMLA | KARMA WANGCHU | INC | 30.3% |
| MUKTO | RINCHIN KHANDU KHRIMEY | IND | 6.0% |
| NACHO | MUKUT MITHI | INC | 12.3% |
| NYAPIN | GEGONG APANG | INC | 32.4% |
| PAKKE KESSANG | TADAK DULOM | INC | 0.2% |
| PALIN | TAPUM JAMOH | PPA | 2.8% |
| RAGA | Komoli Mosang | IND | 4.3% |
| SAGALEE | Lijum Ronya | BJP | 0.6% |
| SEPPA EAST | GYATI TAKKA | INC | 1.1% |
| SEPPA WEST | BOA TAMO | INC | 1.1% |
| TALI | BAKIN PERTIN | PPA | 2.8% |
| TALIHA | C.P.NAMCHOOM | IND | 1.4% |
| TAWANG | TSERING TASHI | INC | 28.7% |
| THRIZINO-BURAGAON | KAMENGDOLO | INC | 8.1% |
| YACHULI | DOI ADO | PPA | 14.6% |
| ZIRO HAPOLI | TODAK BASAR | INC | 27.9% |