Demographics
Coldrerio has a population (as of December 2011) of 2,703. As of 2008, 18.1% of the population are resident foreign nationals. Over the last 10 years (1997–2007) the population has changed at a rate of 2.9%.
Most of the population (as of 2000) speaks Italian (90.3%), with German being second most common (4.5%) and French being third (1.4%). Of the Swiss national languages (as of 2000), 114 speak German, 35 people speak French, 2,293 people speak Italian, and 3 people speak Romansh. The remainder (93 people) speak another language.
As of 2008, the gender distribution of the population was 48.8% male and 51.2% female. The population was made up of 1,023 Swiss men (38.2% of the population), and 284 (10.6%) non-Swiss men. There were 1,165 Swiss women (43.5%), and 209 (7.8%) non-Swiss women.
In 2008 there were 9 live births to Swiss citizens and 5 births to non-Swiss citizens, and in same time span there were 18 deaths of Swiss citizens and 2 non-Swiss citizen deaths. Ignoring immigration and emigration, the population of Swiss citizens decreased by 9 while the foreign population increased by 3. There were 4 Swiss men who immigrated back to Switzerland and 1 Swiss woman who emigrated from Switzerland. At the same time, there were 7 non-Swiss men and 17 non-Swiss women who immigrated from another country to Switzerland. The total Swiss population remained the same in 2008 (from all sources, including moves across municipal borders) while the non-Swiss population change was an increase of 7 people. This represents a population growth rate of 0.3%.
The age distribution, as of 2009, in Coldrerio is; 199 children or 7.4% of the population are between 0 and 9 years old and 292 teenagers or 10.9% are between 10 and 19. Of the adult population, 272 people or 10.1% of the population are between 20 and 29 years old. 337 people or 12.6% are between 30 and 39, 440 people or 16.4% are between 40 and 49, and 419 people or 15.6% are between 50 and 59. The senior population distribution is 352 people or 13.1% of the population are between 60 and 69 years old, 227 people or 8.5% are between 70 and 79, there are 143 people or 5.3% who are over 80.
As of 2000, there were 1,074 private households in the municipality, and an average of 2.4 persons per household. In 2000 there were 307 single family homes (or 56.5% of the total) out of a total of 543 inhabited buildings. There were 217 multi-family buildings (40.0%), along with 9 multi-purpose buildings that were mostly used for housing (1.7%) and 10 other use buildings (commercial or industrial) that also had some housing (1.8%). Of the single family homes 5 were built before 1919, while 41 were built between 1990 and 2000. The greatest number of single family homes (72) were built between 1981 and 1990.
In 2000 there were 1,176 apartments in the municipality. The most common apartment size was 4 rooms of which there were 369. There were 63 single room apartments and 267 apartments with five or more rooms. Of these apartments, a total of 1,069 apartments (90.9% of the total) were permanently occupied, while 66 apartments (5.6%) were seasonally occupied and 41 apartments (3.5%) were empty. The vacancy rate for the municipality, in 2008, was 0.7%. As of 2007, the construction rate of new housing units was 6.9 new units per 1000 residents.
The historical population is given in the following chart:
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