Coldrerio is a municipality in the district of Mendrisio in the canton of Ticino in Switzerland.

[3] Archeological finds in the area provide evidence of a continuous settlement since the Neolithic period.

Excavations of the nearby peat bog (Italian: Torbiera) in 1870 and 1915-21 revealed traces of a settlement with stilt houses.

Caledrano was first mentioned as a village during the Early Middle Ages, as were most of the surrounding settlements.

It was mentioned several times in the following centuries in connection with gifts given to religious institutions around Como, including S. Abbondio, S. Fedele and S. Lazzaro Hospital.

The gift and property documents mention a castle, the village church and several sharecropping farms.

It was part of the County of Seprio and by the late 13th century was listed as a municipality.

The current parish church of St. George was built in the 16th century and enlarged several times.

[3] Coldrerio has an area, as of 1997[update], of 2.46 square kilometers (0.95 sq mi).

It consists of the village of Coldrerio and numerous small settlements, of which Villa is the most important.

Most of the population (as of 2000[update]) speaks Italian (90.3%), with German being second most common (4.5%) and French being third (1.4%).

[6] The age distribution, as of 2009[update], 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.

The entire villages of Coldrerio and Villa are part of the Inventory of Swiss Heritage Sites.

[13] In the 2007[update] Gran Consiglio election, there were a total of 1,818 registered voters in Coldrerio, of which 1,367 or 75.2% voted.

[7] There were 1,145 residents of the municipality who were employed in some capacity, of which females made up 40.1% of the workforce.

In the tertiary sector; 912 or 85.5% were in wholesale or retail sales or the repair of motor vehicles, 21 or 2.0% were in the movement and storage of goods, 42 or 3.9% were in a hotel or restaurant, 3 or 0.3% were in the information industry, 8 or 0.7% were the insurance or financial industry, 9 or 0.8% were technical professionals or scientists, 22 or 2.1% were in education and 18 or 1.7% were in health care.

[17] From the 2000 census[update], 2,199 or 86.6% were Roman Catholic, while 98 or 3.9% belonged to the Swiss Reformed Church.

The wettest month is May during which time Coldrerio receives an average of 188 mm (7.4 in) of rain or snow.

The driest month of the year is December with an average of 67 mm (2.6 in) of precipitation over 5.6 days.

In the lower secondary school system, students either attend a two-year middle school followed by a two-year pre-apprenticeship or they attend a four-year program to prepare for higher education.

The professional program lasts three years and prepares a student for a job in engineering, nursing, computer science, business, tourism and similar fields.