| Election Name: | Indian general election in Tamil Nadu, 1984 |
| Country: | India |
| Type: | parliamentary |
| Ongoing: | no |
| Previous Election: | Indian general election in Tamil Nadu, 1980 |
| Previous Year: | 1980 |
| Next Election: | Indian general election in Tamil Nadu, 1989 |
| Next Year: | 1989 |
| Election Date: | December 1984 |
| Seats For Election: | 39 (of 514) seats in the Lok Sabha |
| Registered: | 30,958,080 |
| Turnout: | 22,591,943 (72.98%) 6.22% |
| Party1: | All India Anna Dravida Munnetra Kazhagam |
| Alliance1: | Congress alliance |
| Leaders Seat1: | Did not contest |
| Seats1: | 37 |
| Seat Change1: | 15 |
| Popular Vote1: | 12,941,942 |
| Percentage1: | 59.87% |
| Swing1: | 2.87% |
| Leaders Seat2: | Did not contest |
| Party2: | Dravida Munnetra Kazhagam |
| Alliance2: | Janata alliance |
| Seats2: | 2 |
| Seat Change2: | 14 |
| Popular Vote2: | 8,006,513 |
| Percentage2: | 37.04% |
| Swing2: | 0.73% |
| Map Size: | 200px |
| Before Election: | Indian National Congress |
| After Party: | Indian National Congress |
The 1984 Indian general election polls in Tamil Nadu were held for 39 seats in the state. The result was a landslide victory for Indian National Congress and its ally All India Anna Dravida Munnetra Kazhagam, winning 37 out of 39 seats. The other 2 seats were won by the opposition, Dravida Munnetra Kazhagam. This marks the start of the dominance of INC-AIADMK, for the next decade winning 38 seats in 1989 election and all 39 seats in 1991 election. The allocation of seats were done what was later dubbed, "The M.G.R formula". Where the regional party would contest 70% of the assembly seats and the national party would be given 70% of the Lok Sabha seats.
| No. | Party | Election Symbol | Leader | Seats | |
|---|---|---|---|---|---|
| 1. | 26 | ||||
| 2. | 12 | ||||
| 3. | 1 | ||||
| No. | Party | Election Symbol | Leader | Seats | |
|---|---|---|---|---|---|
| 1. | 27 | ||||
| 2. | 5 | ||||
| 3. | Communist Party of India (Marxist) | A.Nallasivam | 3 | ||
| 4. | Communist Party of India | P.Manickam | 3 | ||
| 4. | 1 | ||||
| Alliance | Party | align=centre | Popular Vote | align=centre | Percentage | align=centre | Swing | align=centre | Seats won | align=centre | Seat Change | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AIADMK+ | Indian National Congress | 8,755,871 | 40.51% | 8.89% | 25 | 5 | |||||||
| All India Anna Dravida Munnetra Kazhagam | 3,968,967 | 18.36% | 7.02% | 12 | 10 | ||||||||
| Gandhi Kamaraj National Congress | 217,104 | 1.00% | new party | 0 | new party | ||||||||
| Total | 12,941,942 | 59.87% | 2.87% | 37 | 15 | ||||||||
| DMK+ | Dravida Munnetra Kazhagam | 5,597,507 | 25.90% | 2.89% | 2 | 14 | |||||||
| Janata Party | 911,931 | 4.22% | 3.74% | 0 | |||||||||
| Communist Party of India | 738,106 | 3.41% | 0.18% | 0 | |||||||||
| Communist Party of India (Marxist) | 614,893 | 2.84% | 0.37% | 0 | |||||||||
| Tamil Nadu Congress | 144,076 | 0.67% | new party | 0 | new party | ||||||||
| Total | 8,006,513 | 37.04% | 0.73% | 2 | 14 | ||||||||
| Indian National Congress (Jagjivan) | 56,704 | 0.26% | new party | 0 | new party | ||||||||
| Bharatiya Janata Party | 15,462 | 0.07% | new party | 0 | new party | ||||||||
| Independents | 593,382 | 2.76% | 1.65% | 0 | 1 | ||||||||
| Total | 21,614,003 | 100.00% | 39 | ||||||||||
| Valid Votes | 21,614,003 | 95.67% | |||||||||||
| Invalid Votes | 977,940 | 4.33% | |||||||||||
| Total Votes | 22,591,943 | 100.00% | |||||||||||
| Reigstered Voters/Turnout | 30,958,080 | 72.98% | 6.22% | ||||||||||
| Minister | Party | Lok Sabha Constituency/Rajya Sabha | Portfolios | |
|---|---|---|---|---|
| INC | Sivaganga | Minister of Commerce | ||
| M. Arunachalam | INC | Tenkasi | Minister of Industry |