| Country: | Thailand |
| Previous Election: | 1983 |
| Next Election: | 1988 |
| Seats For Election: | All 347 seats in the House of Representatives |
| Majority Seats: | 174 |
| Election Date: | 27 July 1986 |
| Registered: | 26,160,100 |
| Turnout: | 61.43% |
| Party1: | Democrat Party (Thailand) |
| Percentage1: | 22.52 |
| Seats1: | 100 |
| Last Election1: | 56 |
| Party2: | Thai Nation Party |
| Percentage2: | 17.26 |
| Seats2: | 63 |
| Last Election2: | 73 |
| Party3: | Social Action Party |
| Percentage3: | 12.12 |
| Seats3: | 51 |
| Last Election3: | 92 |
| Party4: | United Democrat Party |
| Percentage4: | 10.13 |
| Seats4: | 38 |
| Last Election4: | New |
| Party5: | People Party (Thailand) |
| Percentage5: | 7.40 |
| Seats5: | 18 |
| Last Election5: | New |
| Party6: | Thai Citizen Party |
| Percentage6: | 6.94 |
| Seats6: | 24 |
| Last Election6: | 36 |
| Party7: | Community Action |
| Percentage7: | 6.03 |
| Seats7: | 15 |
| Last Election7: | New |
| Party8: | Progress Party (Thailand, 1983) |
| Percentage8: | 5.31 |
| Seats8: | 9 |
| Last Election8: | 3 |
| Percentage9: | 4.41 |
| Seats9: | 19 |
| Last Election9: | New |
| Party10: | National Democrat Party (Thailand) |
| Percentage10: | 2.86 |
| Seats10: | 3 |
| Last Election10: | 15 |
| Party11: | Mass Party |
| Percentage11: | 1.92 |
| Seats11: | 3 |
| Last Election11: | New |
| Party12: | Liberal Party (Thailand) |
| Percentage12: | 1.08 |
| Seats12: | 1 |
| Last Election12: | New |
| Party13: | Labour Democrat Party |
| Percentage13: | 0.65 |
| Seats13: | 1 |
| Last Election13: | 0 |
| Party14: | New Force Party |
| Percentage14: | 0.62 |
| Seats14: | 1 |
| Last Election14: | 0 |
| Party15: | Thai People Party |
| Percentage15: | 0.52 |
| Seats15: | 1 |
| Last Election15: | 4 |
| Prime Minister | |
| Before Election: | Prem Tinsulanonda |
| Before Party: | Independent politician |
| After Election: | Prem Tinsulanonda |
| After Party: | Independent politician |
General elections were held in Thailand on 27 July 1986. The result was a victory for the Democrat Party, which won 100 of the 347 seats. Voter turnout was 61.4%.[1]