[3] Cornaux has an area, as of 2009[update], of 4.7 square kilometers (1.8 sq mi).

[5] The blazon of the municipal coat of arms is Azure, a Sun in splendour Or, in chief two Trefoils Argent.

[9] Most of the population (as of 2000[update]) speaks French (1,286 or 87.3%) as their first language, German is the second most common (76 or 5.2%) and Italian is the third (31 or 2.1%).

[9] The historical population is given in the following chart:[3][13] The neolithic and Roman era sites at the Ensemble De La Vieille and the gardens of Souaillon Castle are listed as Swiss heritage site of national significance.

[14] In the 2007 federal election the most popular party was the SVP which received 25.45% of the vote.

In the federal election, a total of 497 votes were cast, and the voter turnout was 50.7%.

[15] Its main industrial employers are a refinery, vineyards and a cement factory.

[9] There were 802 residents of the municipality who were employed in some capacity, of which females made up 43.8% of the workforce.

In 2008[update] the total number of full-time equivalent jobs was 413.

In the tertiary sector; 98 or 49.5% were in wholesale or retail sales or the repair of motor vehicles, 7 or 3.5% were in the movement and storage of goods, 11 or 5.6% were in a hotel or restaurant, 5 or 2.5% were in the information industry, 22 or 11.1% were technical professionals or scientists, 6 or 3.0% were in education and 3 or 1.5% were in health care.

[9] From the 2000 census[update], 471 or 32.0% were Roman Catholic, while 594 or 40.3% belonged to the Swiss Reformed Church.

[18] During the 2010-11 school year, there were 1.5 kindergarten classes with a total of 30 students in Cornaux.