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

The name comes from the fortified seat of the Capitanei of Sessa, the ruins of which are on the site of the Chapel of S. Adalberto (first mentioned in 1428) located in Castello.

During the Middle Ages the history of Monteggio was closely connected to the Sessa family.

The tax exemptions granted in the 14th century by the Duke of Milan were reconfirmed in 1513 by the Swiss Confederation.

In the past few decades, various commercial and industrial enterprises have settled in the municipality.

[4] Monteggio had an area, as of 1997[update], of 3.36 square kilometers (1.30 sq mi).

[5] The former municipality is located in the Lugano district, in the lower Malcantone valley on the Italian border.

It is broken up into 26 sections or settlements including Brusata, Castello, Fornasette, Lisora, Molinazzo and Ponte Cremenaga.

Most of the population (as of 2000[update]) speaks Italian (79.6%), with German being second most common (14.5%) and French being third (2.4%).

[7] The age distribution, as of 2009[update], in Monteggio is; 82 children or 9.2% of the population are between 0 and 9 years old and 77 teenagers or 8.7% are between 10 and 19.

[8] The historical population is given in the following chart:[4][13] In the 2007 federal election the most popular party was the FDP which received 31.9% of the vote.

In the federal election, a total of 229 votes were cast, and the voter turnout was 35.9%.

[14] In the 2007[update] Gran Consiglio election, there were a total of 655 registered voters in Monteggio, of which 303 or 46.3% voted.

[8] There were 374 residents of the municipality who were employed in some capacity, of which females made up 40.4% of the workforce.

[8] From the 2000 census[update], 561 or 71.6% were Roman Catholic, while 72 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.