A regional election took place in Brittany on March 16, 1986, along with all other regions.
| Party | %[1] | Seats | |
|---|---|---|---|
| RPR-UDF | 44.00% | 41 | |
| Miscellaneous Right | 5.90% | 4 | |
| RPR-UDF | 49.9% | 45 | |
| PS-PCF-PRG-Les Verts | 32.6% | 30 | |
| PCF | 7.00% | 4 | |
| Presidential Majority | 0.70% | 0 | |
| Left | 40.3% | 34 | |
| FN | 4.90% | 2 | |
| The Greens | 2.40% | 0 | |
| LCR-LO | 0.80% | 0 | |
| Others | 1.70% | 0 | |
| Total | 100.00% | 83 | |
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