Le Mont-sur-Lausanne (French pronunciation: [lə mɔ̃ syʁ lɔzan] ⓘ, literally Le Mont on Lausanne; Arpitan: Lo Mont) is a municipality in the district of Lausanne in the canton of Vaud in Switzerland.

Le Mont-sur-Lausanne is first mentioned in 1237 as Monte super Lausannam.

[3] Le Mont-sur-Lausanne has an area, as of 2009[update], of 9.82–9.75 square kilometers (3.79–3.76 sq mi) (depending on calculation method).

Of the rest of the land, 2.95 km2 (1.14 sq mi) or 30.0% is settled (buildings or roads).

[5] The municipality is located in the northern portion of the agglomeration of Lausanne and on the edge of the Jorat woods.

The blazon of the municipal coat of arms is Gules, three Hills Argent, growing from the middle one a Horse Chestnut Tree; chief of the same.

[9] Most of the population (as of 2000[update]) speaks French (4,539 or 87.6%), with German being second most common (286 or 5.5%) and Italian being third (94 or 1.8%).

[8] The age distribution, as of 2009[update], in Le Mont-sur-Lausanne is; 576 children or 10.6% of the population are between 0 and 9 years old and 740 teenagers or 13.6% are between 10 and 19.

[9] The historical population is given in the following chart:[3][13] In the 2007 federal election the most popular party was the SVP which received 21.54% of the vote.

In the federal election, a total of 1,678 votes were cast, and the voter turnout was 49.6%.

[9] There were 2,544 residents of the municipality who were employed in some capacity, of which females made up 41.4% of the workforce.

In the tertiary sector; 972 or 25.5% were in wholesale or retail sales or the repair of motor vehicles, 139 or 3.6% were in the movement and storage of goods, 65 or 1.7% were in a hotel or restaurant, 212 or 5.6% were in the information industry, 47 or 1.2% were the insurance or financial industry, 415 or 10.9% were technical professionals or scientists, 174 or 4.6% were in education and 549 or 14.4% were in health care.

[9] From the 2000 census[update], 1,678 or 32.4% were Roman Catholic, while 2,304 or 44.5% belonged to the Swiss Reformed Church.

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

[17] During the school year, the political district provided pre-school care for a total of 2,648 children of which 1,947 children (73.5%) received subsidized pre-school care.

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