[3] Chancy has an area, as of 2009[update], of 5.36 square kilometers (2.07 sq mi).

Of the rest of the land, 0.59 km2 (0.23 sq mi) or 11.0% is settled (buildings or roads), 0.21 km2 (0.081 sq mi) or 3.9% is either rivers or lakes and 0.02 km2 (4.9 acres) or 0.4% is unproductive land.

[4] The municipality is located in the Swiss Champagne valley and contains the westernmost point in Switzerland.

It consists of the villages of Chancy and Passeiry as well as the hamlet of Le Cannelet.

[9] Most of the population (as of 2000[update]) speaks French (785 or 86.0%), with English being second most common (48 or 5.3%) and German being third (30 or 3.3%).

[9] The historical population is given in the following chart:[3][13] In the 2007 federal election the most popular party was the SVP which received 28.7% of the vote.

In the federal election, a total of 297 votes were cast, and the voter turnout was 47.4%.

[14] In the 2009 Grand Conseil election, there were a total of 632 registered voters of which 239 (37.8%) voted.

The most popular party in the municipality for this election was the MCG with 22.2% of the ballots.

The second most popular party was the Les Radicaux (with 16.2%), they were sixth in the canton-wide election, while the third most popular party was the Les Verts (with 11.5%), they were second in the canton-wide election.

[15] For the 2009 Conseil d'Etat election, there were a total of 630 registered voters of which 295 (46.8%) voted.

[9] There were 494 residents of the municipality who were employed in some capacity, of which females made up 46.4% of the workforce.

The number of jobs in the secondary sector was 7 of which 3 or (42.9%) were in manufacturing and 4 (57.1%) were in construction.

In the tertiary sector; 14 or 32.6% were in wholesale or retail sales or the repair of motor vehicles, 5 or 11.6% were in a hotel or restaurant, 2 or 4.7% were in the information industry, 3 or 7.0% were technical professionals or scientists, 7 or 16.3% were in education and 3 or 7.0% were in health care.

[9] From the 2000 census[update], 231 or 25.3% were Roman Catholic, while 209 or 22.9% 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.