The 2009 election to the Grand Council was held in the canton of Geneva, Switzerland, on 11 October 2009. All 100 members of the Grand Council were elected for four-year terms.
The Liberal Party remained the largest party, with twenty seats, having lost three since 2005. The centre-right 'Entente', between the Liberals, Free Democratic Party, and Christian Democrats lost a total of five seats. The main winners were the populist Geneva Citizens' Movement,[1] who almost doubled their number of seats to draw level with the Green Party as the second-largest contingent. The far left alliance between solidaritéS and the Swiss Party of Labour failed to overcome the 7% threshold for representation, despite each having each separately received more than 6% at the 2005 election.
|-! style="background-color:#E9E9E9;text-align:left;" colspan=2 |Party! style="background-color:#E9E9E9;text-align:left;" width=150px |Ideology! style="background-color:#E9E9E9;text-align:right;" width=50px |Vote %! style="background-color:#E9E9E9;text-align:right;" width=50px |Vote % ±! style="background-color:#E9E9E9;text-align:right;" width=50px |Seats! style="background-color:#E9E9E9;text-align:right;" width=50px |Seats ±|-| width=5px style="background-color: " || style="text-align:left;" | Liberal Party| style="text-align:left;" | Classical liberalism| style="text-align:right;" | 16.71| style="text-align:right;" | –1.71| style="text-align:right;" | 20| style="text-align:right;" | –3|-| style="background-color: " || style="text-align:left;" | Green Party| style="text-align:left;" | Green politics| style="text-align:right;" | 15.34| style="text-align:right;" | +1.51| style="text-align:right;" | 17| style="text-align:right;" | +1|-| style="background-color: " || style="text-align:left;" | Geneva Citizens' Movement| style="text-align:left;" | Populism| style="text-align:right;" | 14.74| style="text-align:right;" | +7.01| style="text-align:right;" | 17| style="text-align:right;" | +8|-| style="background-color: " || style="text-align:left;" | Social Democratic Party| style="text-align:left;" | Social democracy| style="text-align:right;" | 12.91| style="text-align:right;" | –1.71| style="text-align:right;" | 15| style="text-align:right;" | –2|-| style="background-color: " || style="text-align:left;" | Christian Democratic People's Party| style="text-align:left;" | Christian democracy| style="text-align:right;" | 9.91| style="text-align:right;" | +0.07| style="text-align:right;" | 11| style="text-align:right;" | –1|-| style="background-color: " || style="text-align:left;" | Free Democratic Party| style="text-align:left;" | Classical liberalism| style="text-align:right;" | 9.59| style="text-align:right;" | –0.90| style="text-align:right;" | 11| style="text-align:right;" | –1|-| style="background-color: " || style="text-align:left;" | Swiss People's Party| style="text-align:left;" | National conservatism| style="text-align:right;" | 8.56| style="text-align:right;" | –1.04| style="text-align:right;" | 9| style="text-align:right;" | –2|-| style="background-color: " || style="text-align:left;" | solidaritéS–Swiss Party of Labour| style="text-align:left;" | Socialism| style="text-align:right;" | 6.40| style="text-align:right;" | –7.171| style="text-align:right;" | 0| style="text-align:right;" | ±0|-| | style="text-align:left;" | Defence of the Elderly| style="text-align:left;" | Pensioners' party| style="text-align:right;" | 5.85| style="text-align:right;" | N/A| style="text-align:right;" | 0| style="text-align:right;" | N/A|- style="background: #E9E9E9"! style="text-align:left;" colspan=3| Total (turnout 39.66%)| style="text-align:right;" | 100.00| style="text-align:right;" | –| 100| style="text-align:right;" | –|-| colspan=9 style="text-align:left;" | 1 Compared to total of separate solidaritéS (6.67%) and 'Alliance of the Left' (6.90%) lists in 2005|-| colspan=9 style="text-align:left;" | Source: Republic and Canton of Geneva|}