The Grand Council of Basel-Stadt (German: Grosser Rat) is the legislature of the canton of Basel-Stadt, in Switzerland. Basel-Stadt has a unicameral legislature. The Grand Council has 100 seats, with members elected every four years. Members of the canton's executive, the Executive Council, are elected on the same day.
At the last election, held on 14 September 2008, the Social Democratic Party fared badly, but retained its dominant position, with more than twice as many seats as the next-largest party, the Swiss People's Party (SVP). The legislature was reduced from 130 seats to 100, making all existing parties to lose ground. However, the SVP and Green Party both did relatively well, as did the new centrist Green Liberal Party, which won five seats.
| Party | Ideology | Vote %1 | Vote % ± | Seats | Seats ± | |||
|---|---|---|---|---|---|---|---|---|
| Social Democratic Party | Social democracy | 29.7 | −3.1 | 32 | −14 | |||
| Swiss People's Party | National conservatism | 13.7 | +1.7 | 14 | −1 | |||
| Green Party | Green politics | 13.8 | +2.3 | 13 | −3 | |||
| Free Democratic Party | Classical liberalism | 9.9 | −1.8 | 11 | −6 | |||
| Liberal Party | Classical liberalism | 8.4 | +0.4 | 9 | −3 | |||
| Christian Democratic People's Party | Christian democracy | 9.3 | +1.1 | 8 | −3 | |||
| Green Liberal Party | Green liberalism | 5.1 | N/A | 5 | N/A | |||
| Evangelical People's Party | Christian democracy | 4.4 | −0.1 | 4 | −2 | |||
| Democratic Social Party | Social democracy | 3.1 | −1.5 | 3 | −3 | |||
| Active Bettingen | Liberalism | N/A | N/A | 1 | ±0 | |||
| Swiss Democrats—Federal Democratic Union | 2.4 | −0.8 | 0 | ±0 | ||||
| Homosexual List | 0.2 | N/A | 0 | N/A | ||||
| Total | 100.00 | – | 100 | −30 | ||||
| 1 Excludes Bettingen, which was contested only by Active Bettingen. | ||||||||
| Source: Canton of Basel-Stadt | ||||||||