Samenstelling Provinciale Staten, per provincie, na de verkiezingen van 1966.
| GR | FR | DR | OV | GE | UT | NH | ZH | ZE | NB | LI | NL | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KVP | 3 | 4 | 3 | 17 | 21 | 14 | 18 | 15 | 9 | 50 | 45 | 199 | 
| PvdA | 20 | 18 | 18 | 15 | 16 | 13 | 20 | 25 | 11 | 8 | 6 | 170 | 
| CHU | 6 | 10 | 6 | 9 | 10 | 8 | 6 | 9 | 8 | – | – | 72 | 
| ARP | 10 | 13 | 7 | 5 | 5 | 6 | 6 | 9 | 5 | – | – | 66 | 
| VVD | 6 | 4 | 7 | 5 | 6 | 7 | 10 | 11 | 4 | 3 | 2 | 65 | 
| BP | 3 | 2 | 4 | 4 | 6 | 4 | 6 | 4 | 2 | 5 | 4 | 44 | 
| PSP | 3 | 2 | 1 | 1 | 1 | 2 | 8 | 5 | – | 1 | – | 24 | 
| CPN | 2 | 1 | 1 | 1 | – | – | 5 | 2 | – | – | 1 | 13 | 
| SGP | – | – | – | 1 | 2 | 1 | – | 3 | 4 | – | 11 | |
| PCG | – | – | – | – | – | – | – | – | – | 4 | – | 4 | 
| GPV | 2 | – | – | 1 | – | – | – | – | – | – | – | 3 | 
| FNP | – | 1 | – | – | – | – | – | – | – | – | – | 1 | 
| SCG | – | – | – | – | – | – | – | – | – | – | 1 | 1 | 
| TOT | 55 | 55 | 47 | 59 | 67 | 55 | 79 | 83 | 43 | 71 | 59 | 673 |