Sementina is a former municipality in the district of Bellinzona in the canton of Ticino in Switzerland.

It ceased to exist on 2 April 2017 when it and the municipalities of Camorino, Claro, Giubiasco, Gnosca, Gorduno, Gudo, Moleno, Monte Carasso, Pianezzo, Preonzo, and Sant'Antonio were merged into the municipality of Bellinzona.

Sementina has an area, as of 1997[update], of 8.25 square kilometers (3.19 sq mi).

Most of the population (as of 2000[update]) speaks Italian(87.2%), with German being second most common (5.1%) and Serbo-Croatian being third (1.6%).

[5] The age distribution, as of 2009[update], in Sementina is; 329 children or 10.8% of the population are between 0 and 9 years old and 292 teenagers or 9.6% are between 10 and 19.

[6] The historical population is given in the following table:[11] The Fortificazioni Ottocentesche (also known as the Fortini Della Fame, shared with Camorino and Monte Carasso) and the medieval settlement of S. Defendente are listed as Swiss heritage site of national significance.

[12] In the 2007 federal election the most popular party was the FDP which received 46.5% of the vote.

In the federal election, a total of 972 votes were cast, and the voter turnout was 55.7%.

[13] In the 2007[update] Gran Consiglio election, there were a total of 1,749 registered voters in Sementina, of which 1,329 or 76.0% voted.

[6] There were 1,286 residents of the municipality who were employed in some capacity, of which females made up 43.3% of the workforce.

[16] From the 2000 census[update], 2,119 or 80.1% were Roman Catholic, while 156 or 5.9% 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.

In Ticino, vocational students may either attend school while working on their internship or apprenticeship (which takes three or four years) or may attend school followed by an internship or apprenticeship (which takes one year as a full-time student or one and a half to two years as a part-time student).

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