Demographics
La Sarraz has a population (as of December 2011) of 2,329. As of 2008, 26.6% of the population are resident foreign nationals. Over the last 10 years (1999–2009 ) the population has changed at a rate of 29.8%. It has changed at a rate of 27.9% due to migration and at a rate of 2% due to births and deaths.
Most of the population (as of 2000) speaks French (1,461 or 84.5%), with German being second most common (79 or 4.6%) and Portuguese being third (64 or 3.7%). There are 35 people who speak Italian.
Of the population in the municipality 363 or about 21.0% were born in La Sarraz and lived there in 2000. There were 657 or 38.0% who were born in the same canton, while 237 or 13.7% were born somewhere else in Switzerland, and 420 or 24.3% were born outside of Switzerland.
In 2008 there were 16 live births to Swiss citizens and 3 births to non-Swiss citizens, and in same time span there were 19 deaths of Swiss citizens and 1 non-Swiss citizen death. Ignoring immigration and emigration, the population of Swiss citizens decreased by 3 while the foreign population increased by 2. There were 4 Swiss men who immigrated back to Switzerland and 1 Swiss woman who emigrated from Switzerland. At the same time, there were 12 non-Swiss men and 10 non-Swiss women who immigrated from another country to Switzerland. The total Swiss population change in 2008 (from all sources, including moves across municipal borders) was an increase of 45 and the non-Swiss population increased by 41 people. This represents a population growth rate of 4.9%.
The age distribution, as of 2009, in La Sarraz is; 244 children or 11.3% of the population are between 0 and 9 years old and 254 teenagers or 11.8% are between 10 and 19. Of the adult population, 316 people or 14.7% of the population are between 20 and 29 years old. 355 people or 16.5% are between 30 and 39, 343 people or 16.0% are between 40 and 49, and 264 people or 12.3% are between 50 and 59. The senior population distribution is 191 people or 8.9% of the population are between 60 and 69 years old, 108 people or 5.0% are between 70 and 79, there are 62 people or 2.9% who are between 80 and 89, and there are 13 people or 0.6% who are 90 and older.
As of 2000, there were 688 people who were single and never married in the municipality. There were 829 married individuals, 104 widows or widowers and 107 individuals who are divorced.
As of 2000, there were 738 private households in the municipality, and an average of 2.3 persons per household. There were 253 households that consist of only one person and 40 households with five or more people. Out of a total of 751 households that answered this question, 33.7% were households made up of just one person and there was 1 adult who lived with their parents. Of the rest of the households, there are 203 married couples without children, 232 married couples with children There were 43 single parents with a child or children. There were 6 households that were made up of unrelated people and 13 households that were made up of some sort of institution or another collective housing.
In 2000 there were 192 single family homes (or 53.3% of the total) out of a total of 360 inhabited buildings. There were 89 multi-family buildings (24.7%), along with 58 multi-purpose buildings that were mostly used for housing (16.1%) and 21 other use buildings (commercial or industrial) that also had some housing (5.8%). Of the single family homes 26 were built before 1919, while 16 were built between 1990 and 2000. The greatest number of single family homes (49) were built between 1981 and 1990. The most multi-family homes (34) were built before 1919 and the next most (15) were built between 1981 and 1990. There were 5 multi-family houses built between 1996 and 2000.
In 2000 there were 799 apartments in the municipality. The most common apartment size was 3 rooms of which there were 241. There were 53 single room apartments and 185 apartments with five or more rooms. Of these apartments, a total of 723 apartments (90.5% of the total) were permanently occupied, while 55 apartments (6.9%) were seasonally occupied and 21 apartments (2.6%) were empty. As of 2009, the construction rate of new housing units was 1.4 new units per 1000 residents. The vacancy rate for the municipality, in 2010, was 0.12%.
The historical population is given in the following chart:
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