Onex (French pronunciation: [ɔne]; Arpitan: Ônèx) is a municipality in the canton of Geneva in Switzerland.

This changed when, at the urging of the canton, it sold approximately 11 hectares (27 acres) to the Cité-Nouvelle Foundation to build public housing.

The Foundation built a number of nine to fifteen story apartment blocks on the land to help relieve a housing shortfall in Geneva.

The Cité-Nouvelle was one of the first high density housing blocks on the outskirts of Geneva.

[3] Onex has an area, as of 2009[update], of 2.82 square kilometers (1.09 sq mi).

Of the rest of the land, 2.19 km2 (0.85 sq mi) or 77.7% is settled (buildings or roads), 0.1 km2 (25 acres) or 3.5% is either rivers or lakes.

[10] Most of the population (as of 2000[update]) speaks French (13,064 or 79.6%), with Italian being second most common (767 or 4.7%) and Portuguese being third (692 or 4.2%).

[11] As of 2008[update], the gender distribution of the population was 48.1% male and 51.9% female.

The greatest number of single family homes (127) were built between 1971 and 1980.

[10] The historical population is given in the following chart:[3][14] The entire village of Onex is designated as part of the Inventory of Swiss Heritage Sites.

[15] In the 2007 federal election the most popular party was the SVP which received 25.28% of the vote.

In the federal election, a total of 4,175 votes were cast, and the voter turnout was 45.8%.

[16] In the 2009 Grand Conseil election, there were a total of 9,041 registered voters of which 3,415 (37.8%) voted.

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.

[17] For the 2009 Conseil d'État election, there were a total of 9,048 registered voters of which 4,168 (46.1%) voted.

[10] There were 7,841 residents of the municipality who were employed in some capacity, of which females made up 45.9% of the workforce.

In the tertiary sector; 220 or 12.1% were in wholesale or retail sales or the repair of motor vehicles, 38 or 2.1% were in the movement and storage of goods, 121 or 6.6% were in a hotel or restaurant, 13 or 0.7% were in the information industry, 9 or 0.5% were the insurance or financial industry, 181 or 9.9% were technical professionals or scientists, 192 or 10.5% were in education and 592 or 32.5% were in health care.

From the 2000 census[update], 7,397 or 45.1% were Roman Catholic, while 2,599 or 15.8% belonged to the Swiss Reformed Church.

The education system in the Canton of Geneva allows young children to attend two years of non-obligatory Kindergarten.

The canton's school system provides two years of non-mandatory kindergarten and requires students to attend six years of primary school, with some of the children attending smaller, specialized classes.