Of the rest of the land, 4.26 km2 (1.64 sq mi) or 89.3% is settled (buildings or roads), 0.02 km2 (4.9 acres) or 0.4% is either rivers or lakes.

[3] The municipality is located on the left bank of the Rhone river.

It consists of the villages of Grand-Lancy and Petit-Lancy (which are separated from each other by the Aire valley) as well as the hamlets of Pesay, Saint-Georges, La Tour, La Vendée, Le Pont Rouge.

[8] Most of the population (as of 2000[update]) speaks French (20,422 or 79.5%), with Portuguese being second most common (1,031 or 4.0%) and Italian being third (1,029 or 4.0%).

[9] As of 2008[update], the gender distribution of the population was 48.2% male and 51.8% female.

Out of a total of 11,466 households that answered this question, 35.7% were made up of just one person and there were 52 adults who lived with their parents.

[8] The historical population is given in the following chart:[12][13] In the 2007 federal election the most popular party was the SVP which received 23.87% of the vote.

In the federal election, a total of 6,431 votes were cast, and the voter turnout was 45.7%.

[14] In the 2009 Grand Conseil election, there were a total of 14,212 registered voters of which 5,390 (37.9%) voted.

In the canton-wide election they received the third highest proportion of votes.

The second most popular party was the Les Socialistes (with 13.3%), they were fourth in the canton-wide election, while the third most popular party was the Les Verts (with 12.9%), they were second in the canton-wide election.

[15] For the 2009 Conseil d'Etat election, there were a total of 14,236 registered voters of which 6,558 (46.1%) voted.

[15] The commune has the head office of Geneva Public Transport.

Both are located on the CEVA orbital railway with frequent service by trains of the Léman Express.

[8] There were 12,713 residents of the municipality who were employed in some capacity, of which females made up 45.6% of the workforce.

In the tertiary sector; 4,014 or 30.9% were in wholesale or retail sales or the repair of motor vehicles, 2,451 or 18.9% were in the movement and storage of goods, 417 or 3.2% were in a hotel or restaurant, 329 or 2.5% were in the information industry, 1,292 or 9.9% were the insurance or financial industry, 1,031 or 7.9% were technical professionals or scientists, 1,012 or 7.8% were in education and 767 or 5.9% were in health care.

[8] From the 2000 census[update], 11,624 or 45.3% were Roman Catholic, while 4,046 or 15.8% 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.