[3] In 1911, shortly after the invention of powered aircraft, one of Switzerland's first aerodromes was founded in Collex-Bossy.

It featured grass runways and hangars,[4] but was already abandoned a couple of years later.

In 1919, the great council of the canton of Geneva chose the site for the construction of a modern airport.

However, it soon opted for the nearby area of Cointrin instead, since some land-owners demanded high prices and lengthy court cases were expected for possible expropriations.

[5] Collex-Bossy has an area, as of 2009[update], of 6.89 square kilometers (2.66 sq mi).

[6] The municipality is located on the right bank of the Versoix river and along the French border.

[10] Most of the population (as of 2000[update]) speaks French (1,023 or 80.0%), with English being second most common (121 or 9.5%) and German being third (42 or 3.3%).

The greatest number of single family homes (71) were built between 1981 and 1990.

[10] The historical population is given in the following chart:[3][14] In the 2007 federal election the most popular party was the SVP which received 21.51% of the vote.

In the federal election, a total of 463 votes were cast, and the voter turnout was 55.1%.

[15] In the 2009 Grand Conseil election, there were a total of 862 registered voters of which 382 (44.3%) voted.

[16] For the 2009 Conseil d'État election, there were a total of 853 registered voters of which 465 (54.5%) voted.

[10] There were 650 residents of the municipality who were employed in some capacity, of which females made up 41.5% of the workforce.

The number of jobs in the primary sector was 34, of which 32 were in agriculture and 2 were in forestry or lumber production.

In the tertiary sector; 34 or 38.2% were in wholesale or retail sales or the repair of motor vehicles, 4 or 4.5% were in the movement and storage of goods, 14 or 15.7% were in a hotel or restaurant, 2 or 2.2% were in the information industry, 6 or 6.7% were technical professionals or scientists, 18 or 20.2% were in education and 1 was in health care.

[10] From the 2000 census[update], 465 or 36.4% were Roman Catholic, while 326 or 25.5% 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 46 lower secondary students who attended school in Collex-Bossy.