United States Senate elections, 1958 Senate composition as a result of the elections Senate composition as a result of the elections

| D_49_ | D_48_ | D_47_ | D_46_ | D_45_ | D_44_ | D_43_ | D_42_ | D_41_ |
|---|---|---|---|---|---|---|---|---|
| D 50 + | ← Majority | ← Majority | ← Majority | ← Majority | ← Majority | ← Majority | ← Majority | ← Majority |
| D 50 + | D 51 + | D 52 + | D 53 + | D 54 + | D 55 + | D 56 + | D 57 + | D 58 + |
| R 30 √ | R 31 √ | R 32 O | R 33 O | R 34 O | D 64 ^ | D 63 ^ | D 62 + | D 61 + |
| R 29 √ | R 28 √ | R 27 √ | R 26 | R 25 | R 24 | R 23 | R 22 | R 21 |
| R 10 | R 11 | R 12 | R 13 | R 14 | R 15 | R 16 | R 17 | R 18 |
| R 9 | R 8 | R 7 | R 6 | R 5 | R 4 | R 3 | R 2 | R 1 |