| Election Name: | 1866 Belgian general election |
| Country: | Belgium |
| Type: | parliamentary |
| Previous Election: | 1864 Belgian general election |
| Previous Year: | 1864 |
| Next Election: | 1868 Belgian general election |
| Next Year: | 1868 |
| Seats For Election: | 61 of the 122 seats in the Chamber of Representatives |
| Majority Seats: | 62 |
| Leader1: | Charles Rogier |
| Leader Since1: | Candidate for PM |
| Party1: | Liberal Party (Belgium) |
| Seats Before1: | 64 seats |
| Seats1: | 43 |
| Seats After1: | 70 |
| Seat Change1: | 6 |
| Popular Vote1: | 20,965 |
| Percentage1: | 58.20% |
| Party2: | Catholic |
| Seats Before2: | 52 seats |
| Seats2: | 18 |
| Seats After2: | 52 |
| Popular Vote2: | 15,060 |
| Percentage2: | 41.80% |
| Color2: | FFFF00 |
| Government | |
| Posttitle: | Government after election |
| Before Election: | Rogier II |
| Before Party: | Liberal Party (Belgium) |
| After Election: | Rogier II |
| After Party: | Liberal Party (Belgium) |
Partial general elections were held in Belgium on 12 June 1866.[1] [2] In the elections for the Chamber of Representatives the result was a victory for the Liberal Party, which won 70 of the 122 seats.[2] Voter turnout was 70%, although only 51,465 people were eligible to vote.
Under the alternating system, elections were only held in four out of the nine provinces: Hainaut, Limburg, Liège and East Flanders. Special elections were held in the arrondissements of Antwerp, Brussels and Leuven.
The distribution of seats among the electoral districts was as follows for the Chamber of Representatives, with the difference compared to the previous election due to population growth:[3]
| Province | Arrondissement | Seats | Change | |
|---|---|---|---|---|
| 6 | +1 | |||
| 3 | – | |||
| 3 | – | |||
| 2 | – | |||
| 1 | – | |||
| 2 | – | |||
| 3 | – | |||
| 3 | – | |||
| 8 | – | |||
| 1 | – | |||
| 3 | – | |||
| 3 | – | |||
| 3 | – | |||
| 2 | – | |||
| 2 | – | |||
| 4 | – | |||
| 3 | – | |||
| 1 | – | |||
| 1 | – | |||
| 1 | – | |||
| 5 | +1 | |||
| 13 | +2 | |||
| 4 | – | |||
| 4 | – | |||
| 2 | – | |||
| 5 | +1 | |||
| 3 | +1 | |||
| 5 | – | |||
| 3 | – | |||
| 2 | – | |||
| 1 | – | |||
| 8 | +1 | |||
| 3 | – | |||
| 1 | – | |||
| 1 | – | |||
| 1 | – | |||
| 1 | – | |||
| 1 | – | |||
| 4 | – | |||
| 2 | – | |||
| 2 | +1 | |||
| 124 | +8 |