United States Senate elections, 1986 Senate composition before the elections Senate composition before the elections

| D_41 | D_42 | D_43 | D_44 | D_45 | D_46 | D_47 | R_53 | R_52 | R_51 |
|---|---|---|---|---|---|---|---|---|---|
| R 41 | R 42 | R 43 | R 44 | R 45 | R 46 | R 47 | R 48 | R 49 | R 50 |
| R 40 | R 39 | R 38 | R 37 | R 36 | R 35 | R 34 | R 33 | R 32 | R 31 |
| R 21 | R 22 | R 23 | R 24 | R 25 | R 26 | R 27 | R 28 | R 29 | R 30 |
| R 20 | R 19 | R 18 | R 17 | R 16 | R 15 | R 14 | R 13 | R 12 | R 11 |
| R 1 | R 2 | R 3 | R 4 | R 5 | R 6 | R 7 | R 8 | R 9 | R 10 |