Thierrens is a former municipality in the district Gros-de-Vaud in the canton of Vaud in Switzerland.

[2] Thierrens had an area, as of 2009[update], of 8.7 square kilometers (3.4 sq mi).

Of the rest of the land, 0.57 km2 (0.22 sq mi) or 6.5% is settled (buildings or roads).

[8] Most of the population (as of 2000[update]) speaks French (534 or 92.2%), with Portuguese being second most common (22 or 3.8%) and German being third (13 or 2.2%).

[7] The age distribution, as of 2009[update], in Thierrens is; 80 children or 11.9% of the population are between 0 and 9 years old and 97 teenagers or 14.5% are between 10 and 19.

[8] The historical population is given in the following chart:[2][12] In the 2007 federal election the most popular party was the SVP which received 31.91% of the vote.

[8] There were 307 residents of the municipality who were employed in some capacity, of which females made up 40.4% of the workforce.

The number of jobs in the primary sector was 47, of which 45 were in agriculture and 2 were in forestry or lumber production.

In the tertiary sector; 22 or 22.4% were in wholesale or retail sales or the repair of motor vehicles, 13 or 13.3% were in the movement and storage of goods, 7 or 7.1% were in a hotel or restaurant, 10 or 10.2% were the insurance or financial industry, 5 or 5.1% were technical professionals or scientists, 26 or 26.5% were in education and 9 or 9.2% were in health care.

[8] From the 2000 census[update], 121 or 20.9% were Roman Catholic, while 336 or 58.0% belonged to the Swiss Reformed Church.

The wettest month is June during which time Thierrens receives an average of 111 mm (4.4 in) of rain or snow.

The month with the most days of precipitation is May, with an average of 13.2, but with only 102 mm (4.0 in) of rain or snow.

The driest month of the year is February with an average of 76 mm (3.0 in) of precipitation over 10.2 days.

In the Vaud cantonal school system, two years of non-obligatory pre-school are provided by the political districts.

The canton's primary school program requires students to attend for four years.

[15] From July 16 to August 3, 2003, Thierrens hosted the canton-wide festival of the Fédération Vaudoise des Jeunesses Campagnardes (FVJC).