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Age, status and households

As of 2000, children and teenagers (0–19 years old) made up 18.2% of the population, while adults (20–64 years old) made up 65.8% and seniors (over 64 years old) make up 16%.

As of 2000, there were 78,666 people who were single and never married in the municipality. There were 74,205 married individuals, 10,006 widows or widowers and 15,087 individuals who are divorced.

As of 2000, there were 86,231 private households in the municipality, and an average of 1.9 persons per household. There were 44,373 households that consist of only one person and 2,549 households with five or more people. Out of a total of 89,269 households that answered this question, 49.7% were households made up of just one person and there were 471 adults who lived with their parents. Of the rest of the households, there are 17,429 married couples without children, 16,607 married couples with children. There were 5,499 single parents with a child or children. There were 1,852 households that were made up of unrelated people and 3,038 households that were made up of some sort of institution or another collective housing.

In 2000, there were 743 single family homes (or 10.6% of the total) out of a total of 6,990 inhabited buildings. There were 2,758 multi-family buildings (39.5%), along with 2,886 multi-purpose buildings that were mostly used for housing (41.3%) and 603 other use buildings (commercial or industrial) that also had some housing (8.6%). Of the single family homes, 197 were built before 1919, while 20 were built between 1990 and 2000. The greatest number of single family homes (277) were built between 1919 and 1945.

In 2000, there were 101,794 apartments in the municipality. The most common apartment size was 3 rooms of which there were 27,084. There were 21,889 single room apartments and 11,166 apartments with five or more rooms. Of these apartments, a total of 85,330 apartments (83.8% of the total) were permanently occupied, while 13,644 apartments (13.4%) were seasonally occupied and 2,820 apartments (2.8%) were empty. As of 2009, the construction rate of new housing units was 1.3 new units per 1000 residents.

As of 2003, the average price to rent an average apartment in Geneva was 1163.30 Swiss francs (CHF) per month (US$930, £520, €740 approx. exchange rate from 2003). The average rate for a one-room apartment was 641.60 CHF (US$510, £290, €410), a two-room apartment was about 874.46 CHF (US$700, £390, €560), a three-room apartment was about 1126.37 CHF (US$900, £510, €720) and a six or more room apartment cost an average of 2691.07 CHF (US$2150, £1210, €1720). The average apartment price in Geneva was 104.2% of the national average of 1116 CHF. The vacancy rate for the municipality, in 2010, was 0.25%.

In June 2011, the average price of an apartment in and around Geneva was 13,681 CHF per square metre (11 sq ft). The average can be as high as 17,589 Swiss francs (CHF) per square metre (11 sq ft) for a luxury apartment and as low as 9,847 Swiss francs (CHF) for an older or basic apartment. For houses in and around Geneva, the average price was 11,595 Swiss francs (CHF) per square metre (11 sq ft) (June 2011), with a lowest price per square metre (11 sq ft) of 4,874 Swiss francs (CHF), and a maximum price of 21,966 Swiss francs (CHF).