Demographics
Aargau has a population (as of December 2011) of 621,398. As of 2010, 21.5% of the population are resident foreign nationals. Over the last 10 years (2000–2010) the population has changed at a rate of 11%. Migration accounted for 8.7%, while births and deaths accounted for 2.8%. Most of the population (as of 2000) speaks German (477,093 or 87.1%) as their first language, Italian is the second most common (17,847 or 3.3%) and Serbo-Croatian is the third (10,645 or 1.9%). There are 4,151 people who speak French and 618 people who speak Romansh.
Of the population in the canton, 146,421 or about 26.7% were born in Aargau and lived there in 2000. There were 140,768 or 25.7% who were born in the same canton, while 136,865 or 25.0% were born somewhere else in Switzerland, and 107,396 or 19.6% were born outside of Switzerland.
As of 2000, children and teenagers (0–19 years old) make up 24.3% of the population, while adults (20–64 years old) make up 62.3% and seniors (over 64 years old) make up 13.4%.
As of 2000, there were 227,656 people who were single and never married in the canton. There were 264,939 married individuals, 27,603 widows or widowers and 27,295 individuals who are divorced.
As of 2000, there were 224,128 private households in the canton, and an average of 2.4 persons per household. There were 69,062 households that consist of only one person and 16,254 households with five or more people. As of 2009, the construction rate of new housing units was 6.5 new units per 1000 residents. The vacancy rate for the canton, in 2010, was 1.54%.
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