Corsier (kɔʁsje, locally kɔʁzje) is a municipality of the Canton of Geneva, Switzerland. Corsier is first mentioned in 1297 as Corsiacum. Between 1816-58 Corsier and Anières formed a single municipality. Corsier has an area, , of . Of this area, or 57.7% is used for agricultural purposes, while or 2.9% is forested. Of the rest of the land, or 40.1% is settled (buildings or roads), or 1.1% is either rivers or lakes and or 0.4% is unproductive land. Of the built up area, housing and buildings made up 27.4% and transportation infrastructure made up 4.0%. while parks, green belts and sports fields made up 1.8%. Out of the forested land, 2.2% of the total land area is heavily forested and 0.7% is covered with orchards or small clusters of trees. Of the agricultural land, 39.4% is used for growing crops and 9.1% is pastures, while 9.1% is used for orchards or vine crops. All the water in the municipality is flowing water. The municipality is located on the left bank of Lake Geneva. Corsier has a population () of . , 29.1% of the population are resident foreign nationals. Over the last 10 years (1999–2009 ) the population has changed at a rate of 5.2%. It has changed at a rate of -0.8% due to migration and at a rate of 5.5% due to births and deaths. Most of the population () speaks French (1,361 or 80.9%), with English being second most common (106 or 6.3%) and German being third (74 or 4.4%). the gender distribution of the population was 50.0% male and 50.0% female. The population was made up of 636 Swiss men (35.1% of the population) and 271 (14.9%) non-Swiss men. There were 670 Swiss women (36.9%) and 237 (13.1%) non-Swiss women. Of the population in the municipality 304 or about 18.1% were born in Corsier and lived there in 2000. There were 522 or 31.0% who were born in the same canton, while 253 or 15.0% were born somewhere else in Switzerland, and 558 or 33.2% were born outside of Switzerland. In there were 11 live births to Swiss citizens and 7 births to non-Swiss citizens, and in same time span there were 5 deaths of Swiss citizens and 1 non-Swiss citizen death.