Croglio is a former municipality in the district of Lugano in the canton of Ticino in Switzerland.

[4] Croglio had an area, as of 1997[update], of 4.38 square kilometers (1.69 sq mi).

[5] The former municipality is located in the Lugano district in the middle Malcantone valley.

It consists of the settlements of Croglio, Castelrotto, Ronco, Madonna del Piano, Barico, Purasca and Biogno-Beride.

Biogno and Beride were originally two independent municipalities with a shared administration.

Most of the population (as of 2000[update]) speaks Italian (80.7%), with German being second most common (14.1%) and French being third (2.3%).

The total Swiss population change in 2008 (from all sources, including moves across municipal borders) was an increase of 13 and the non-Swiss population change was a decrease of 4 people.

[8] The age distribution, as of 2009[update], in Croglio is; 85 children or 10.0% of the population are between 0 and 9 years old and 74 teenagers or 8.7% are between 10 and 19.

[9] The historical population is given in the following chart:[4][14] The entire village of Castelrotto is designated as part of the Inventory of Swiss Heritage Sites[15] In the 2007 federal election the most popular party was the FDP which received 30.42% of the vote.

In the federal election, a total of 249 votes were cast, and the voter turnout was 38.9%.

[16] In the 2007[update] Gran Consiglio election, there were a total of 634 registered voters in Croglio, of which 315 or 49.7% voted.

[9] There were 426 residents of the municipality who were employed in some capacity, of which females made up 44.1% of the workforce.

[19] From the 2000 census[update], 623 or 72.0% were Roman Catholic, while 80 or 9.2% belonged to the Swiss Reformed Church.

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 upper secondary school includes several options, but at the end of the upper secondary program, a student will be prepared to enter a trade or to continue on to a university or college.

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