In the
2007 federal election the most popular party was the
SVP which received 25.28% of the vote. The next three most popular parties were the
SP (20.77%), the
Green Party (14.63%) and the
LPS Party (10.43%). In the federal election, a total of 4,175 votes were cast, and the
voter turnout was 45.8%. In the 2009
Grand Conseil election, there were a total of 9,041 registered voters of which 3,415 (37.8%) voted. The most popular party in the municipality for this election was the
MCG with 20.1% of the ballots. In the canton-wide election they received the third highest proportion of votes. The second most popular party was the
Les Socialistes (with 12.7%), they were fourth in the canton-wide election, while the third most popular party was the
Les Verts (with 12.6%), they were second in the canton-wide election. For the 2009 Conseil d'État election, there were a total of 9,048 registered voters of which 4,168 (46.1%) voted. In 2011, all the municipalities held local elections, and in Onex there were 29 spots open on the municipal council. There were a total of 12,535 registered voters of which 4,855 (38.7%) voted. Out of the 4,855 votes, there were 37 blank votes, 52 null or unreadable votes and 354 votes with a name that was not on the list. ==Economy==