[4] Bernex has an area, as of 2009[update], of 12.95 square kilometers (5.00 sq mi).

It consists of 7 villages of Bernex and the hamlets of Chèvres, Loëx, Lully, Cressy, Challoux, Sézenove.

[6] The 7 villages that compose Bernex's municipality are symbolically recalled on the coat of arms by the 7 flames of fire that burn at the top of the hill.

The municipality of Bernex consists of the sub-sections or villages of Les Teppes, Châtillon, Chèvres, Loëx, Cressy - Molliers, Saint-Mathieu - Combes, Saint-Mathieu - stand, Luchepelet, Vailly, Le Gamay, La Naz - Guillon.

[11] Most of the population (as of 2000[update]) speaks French (7,759 or 85.5%), with German being second most common (421 or 4.6%) and English being third (193 or 2.1%).

Commissions, in which the parties elected to the municipal council are represented by 1 or 2 commissioners, in proportion to their number of plenary seats, deal with particular subjects such as finance, buildings, social affairs, etc.

In the 2007 federal election the most popular party was the SVP which received 19.7% of the vote.

In the federal election, a total of 2,898 votes were cast, and the voter turnout was 49.7%.

[17] In the 2009 Grand Conseil election, there were a total of 5,937 registered voters of which 2,486 (41.9%) voted.

[18] For the 2009 Conseil d'État election, there were a total of 5,945 registered voters of which 2,954 (49.7%) voted.

[11] There were 4,543 residents of the municipality who were employed in some capacity, of which females made up 44.8% of the workforce.

The number of jobs in the primary sector was 148, of which 145 were in agriculture and 3 were in forestry or lumber production.

In the tertiary sector; 146 or 11.2% were in wholesale or retail sales or the repair of motor vehicles, 36 or 2.8% were in the movement and storage of goods, 46 or 3.5% were in a hotel or restaurant, 13 or 1.0% were in the information industry, 29 or 2.2% were the insurance or financial industry, 118 or 9.1% were technical professionals or scientists, 49 or 3.8% were in education and 662 or 50.8% were in health care.

[11] From the 2000 census[update], 3,679 or 40.5% were Roman Catholic, while 1,934 or 21.3% 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.

[21] Bernex is home to one of the flagships of religious architecture in the canton of Geneva, the Roman Catholic Church, dedicated to Saint Maurice.

Built between 1864 and 1865, by the contractor and architect Jean-François Charrière, it preserves a rich neo-gothic decor and has stained glass windows of exceptional artistic and artisanal beauty, made by the workshops of the abbot F. Pron, a glass painter from Pont-d'Ain.

Its classification as part of the Swiss heritage of Geneva dates from 19 April 1996.

Since 1988, the municipality has participated in the Geneva recycling programme for the collection of organic waste for composting, a pioneering policy in Switzerland at the time of its launch.

[24] In April 2017, the municipality announced its plan to reduce the use of fuel oil by 96% by 2030.