# Historic composition of the Senate of the Netherlands

The historic composition of the Senate gives an overview of the composition of the upper house of the Dutch parliament (Dutch: Eerste Kamer, "First Chamber"). It shows the composition after the indirect elections by the provincial councils.
| Party | 1922 | 1923 | 1926 | 1929 | 1932 | 1935 | 1937 | 1946 | 1951 | 1952 | 1955 | 1956* | 1959 | 1963 | 1966 | 1969 | 1971 | 1974 | 1977 | 1980 | 1981 | 1983 | 1986 | 1987 | 1991 | 1995 | 1999 | 2003 | 2007 | 2011 | 2015 | 2019 | Party |
| RKSP | 21 | 16 | 16 | 16 | 16 | 16 | 16 | | | | | | | | | | | | | | | | | | | | | | | | | | RKSP |
| KVP | | | | | | | | 17 | 16 | 17 | 17 | 25 | 26 | 26 | 25 | 24 | 22 | 16 | | | | | | | | | | | | | | | KVP |
| ARP | 14 | 8 | 7 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 7 | 7 | 7 | 7 | 6 | | | | | | | | | | | | | | | ARP |
| CHU | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 5 | 6 | 6 | 6 | 8 | 8 | 7 | 7 | 8 | 7 | 7 | | | | | | | | | | | | | | | CHU |
| CDA | | | | | | | | | | | | | | | | | | | 24 | 27 | 28 | 26 | 26 | 26 | 27 | 19 | 20 | 23 | 21 | 11 | 12 | 9 | CDA |
| GPV | | | | | | | | | | | | | | | | | | | 1 | 1 | | 1 | 1 | 1 | 1 | 1 | | | | | | | GPV |
| RPF | | | | | | | | | | | | | | | | | | | | | | 1 | 1 | 1 | 1 | 1 | | | | | | | RPF |
| CU | | | | | | | | | | | | | | | | | | | | | | | | | | | 4 | 2 | 4 | 2 | 3 | 4 | CU |
| SGP | | | | | | | | | | | | 1 | | | | | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 1 | 2 | 2 | SGP |
| LPF | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1 | | | | | LPF |
| LSP | 1 | 5 | 6 | 6 | 6 | 5 | 3 | | | | | | | | | | | | | | | | | | | | | | | | | | LSP |
| VDB | 4 | 3 | 3 | 4 | 4 | 3 | 2 | | | | | | | | | | | | | | | | | | | | | | | | | | VDB |
| PvdV | | | | | | | | 3 | | | | | | | | | | | | | | | | | | | | | | | | | PvdV |
| VVD | | | | | | | | | 4 | 4 | 4 | 7 | 8 | 7 | 8 | 8 | 8 | 12 | 15 | 13 | 12 | 17 | 16 | 12 | 12 | 23 | 19 | 15 | 14 | 16 | 13 | 12 | VVD |
| D66 | | | | | | | | | | | | | | | | 3 | 6 | 3 | | 2 | 4 | 6 | 6 | 5 | 12 | 7 | 4 | 3 | 2 | 5 | 10 | 7 | D66 |
| SDAP | 3 | 11 | 11 | 11 | 11 | 11 | 12 | | | | | | | | | | | | | | | | | | | | | | | | | | SDAP |
| PvdA | | | | | | | | 14 | 14 | 14 | 14 | 22 | 23 | 25 | 22 | 20 | 18 | 21 | 25 | 26 | 28 | 17 | 17 | 26 | 16 | 14 | 15 | 19 | 14 | 14 | 8 | 6 | PvdA |
| PPR | | | | | | | | | | | | | | | | 1 | 2 | 4 | 5 | 3 | 1 | 1 | 2 | 1 | | | | | | | | | PPR |
| PSP | | | | | | | | | | | | | | 2 | 3 | | 1 | | 1 | 1 | | 2 | 2 | 1 | | | | | | | | | PSP |
| CPN | | | | | | | | 4 | 3 | 2 | 2 | 4 | 2 | 1 | 1 | 1 | 3 | 4 | 2 | 1 | 1 | 2 | 2 | 1 | | | | | | | | | CPN |
| GL | | | | | | | | | | | | | | | | | | | | | | | | | 4 | 4 | 8 | 5 | 4 | 5 | 4 | 8 | GL |
| SP | | | | | | | | | | | | | | | | | | | | | | | | | | 1 | 2 | 4 | 12 | 8 | 9 | 4 | SP |
| NSB | | | | | | 2 | 4 | | | | | | | | | | | | | | | | | | | | | | | | | | NSB |
| BP | | | | | | | | | | | | | | | 2 | 3 | | 1 | 1 | | | | | | | | | | | | | | BP |
| AOV | | | | | | | | | | | | | | | | | | | | | | | | | | 2 | | | | | | | AOV |
| OSF | | | | | | | | | | | | | | | | | | | | | | | | | | 1 | 1 | 1 | 1 | 1 | 1 | 1 | OSF |
| PvdD | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1 | 1 | 2 | 3 | PvdD |
| PVV | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 10 | 9 | 5 | PVV |
| 50+ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1 | 2 | 2 | 50+ |
| FVD | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 12 | FVD |
| Total | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 75 | 75 | 75 | 75 | 75 | 75 | 75 | 75 | 75 | 75 | 75 | 75 | 75 | 75 | 75 | 75 | 75 | 75 | 75 | 75 | 75 | Total |
| Party | 1922 | 1923 | 1926 | 1929 | 1932 | 1935 | 1937 | 1946 | 1951 | 1952 | 1955 | 1956* | 1959 | 1963 | 1966 | 1969 | 1971 | 1974 | 1977 | 1980 | 1981 | 1983 | 1986 | 1987 | 1991 | 1995 | 1999 | 2003 | 2007 | 2011 | 2015 | 2019 | Party |
* Since 1956 the Senate has had 75 seats.