Demographics
Hellsau has a population (as of December 2011) of 193. As of 2010, 2.6% of the population are resident foreign nationals. Over the last 10 years (2000-2010) the population has changed at a rate of -5%. Migration accounted for 0.5%, while births and deaths accounted for 1%.
Most of the population (as of 2000) speaks German (189 or 97.9%) as their first language, with one person each speaking French or Dutch.
As of 2008, the population was 51.3% male and 48.7% female. The population was made up of 95 Swiss men (49.2% of the population) and 4 (2.1%) non-Swiss men. There were 93 Swiss women (48.2%) and 1 (0.5%) non-Swiss women. Of the population in the municipality, 55 or about 28.5% were born in Hellsau and lived there in 2000. There were 93 or 48.2% who were born in the same canton, while 37 or 19.2% were born somewhere else in Switzerland, and 7 or 3.6% were born outside of Switzerland.
As of 2010, children and teenagers (0–19 years old) make up 25.4% of the population, while adults (20–64 years old) make up 61.1% and seniors (over 64 years old) make up 13.5%.
As of 2000, there were 85 people who were single and never married in the municipality. There were 92 married individuals, 10 widows or widowers and 6 individuals who are divorced.
As of 2000, there were 12 households that consist of only one person and 8 households with five or more people. In 2000, a total of 66 apartments (95.7% of the total) were permanently occupied, while 1 apartment was seasonally occupied and 2 apartments (2.9%) were empty. As of 2010, the construction rate of new housing units was 5.2 new units per 1000 residents. The vacancy rate for the municipality, in 2011, was 1.3%.
The historical population is given in the following chart:
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