Plan-les-Ouates (French pronunciation: [plɑ̃ le wat][3]) is a municipality of the canton of Geneva in Switzerland.

[5] Plan-les-Ouates has an area, as of 2009[update], of 5.86 square kilometers (2.26 sq mi).

It consists of the village of Plan-les-Ouates and the hamlets of Arare [fr] and Saconnex d'Arve.

The municipality of Plan-les-Ouates consists of the sub-sections or villages of ZIPLO, Les Cherpines, Les Voirets, Plan-les-Ouates - village, Le Sapey, Bois d'Humilly, Drize - La Chapelle, Saconnex d'Arve - Dessus, Champ-Gredin, Arare - Plein-Vent, Arare - La Gravière.

[11] Most of the population (as of 2000[update]) speaks French (5,890 or 86.6%), with German being second most common (286 or 4.2%) and Italian being third (151 or 2.2%).

[11] The historical population is given in the following chart:[4][15] The Forte D’Arare House, the Patek Philippe SA Archives and the Vacheron Constantin Archives are listed as Swiss heritage site of national significance.

[16] Plan-les-Ouates is twinned with:[17] In the 2007 federal election the most popular party was the SVP which received 21.03% of the vote.

In the federal election, a total of 2,594 votes were cast, and the voter turnout was 50.4%.

[18] In the 2009 Grand Conseil election, there were a total of 5,361 registered voters of which 2,325 (43.4%) voted.

The most popular party in the municipality for this election was the Les Verts with 15.4% of the ballots.

[19] For the 2009 Conseil d'Etat election, there were a total of 5,359 registered voters of which 2,690 (50.2%) voted.

[11] There were 3,395 residents of the municipality who were employed in some capacity, of which females made up 44.5% of the workforce.

In 2008[update] the total number of full-time equivalent jobs was 10,801.

In the tertiary sector; 1,217 or 33.2% were in wholesale or retail sales or the repair of motor vehicles, 235 or 6.4% were in the movement and storage of goods, 156 or 4.3% were in a hotel or restaurant, 392 or 10.7% were in the information industry, 81 or 2.2% were the insurance or financial industry, 613 or 16.7% were technical professionals or scientists, 233 or 6.4% were in education and 341 or 9.3% were in health care.

[11] From the 2000 census[update], 3,027 or 44.5% were Roman Catholic, while 1,268 or 18.6% 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.

There were 428 lower secondary students who attended school in Plan-les-Ouates.