Ollon is a municipality in the district of Aigle in the canton of Vaud in Switzerland, sited in the foothills of the mountains to the south-east of the Lake of Geneva.

[4] The village of Saint-Triphon is situated on three hills overlooking the Rhone valley.

Archeological finds include items from the Middle Neolithic to the Roman era, including an Early Bronze Age necropolis and a Late Bronze Age smelter for copper processing.

[5] On the hill Le Lessus stands a 18 m (59 ft) high square tower, probably from the 13th century.

In 1232 the Counts of Savoy granted the castle to Guy de Saillon.

[5] Ollon has an area, as of 2009[update], of 59.54 square kilometers (22.99 sq mi).

The area covered by Ollon borders the Rhône on the southwest side, and rises up the mountainside as far as Chamossaire.

It consists of the village of Ollon and 23 other villages and hamlets (including; Antagnes, Arveyes, Chesières, Huémoz, Panex, Saint-Triphon, Villars-sur-Ollon) as well as scattered summer grazing camps (Bretaye, Les Closalets, La Barboleusaz).

The blazon of the municipal coat of arms is Quartered Vert and Gules, overall a Cross couped Argent.

[9] The age distribution, as of 2009[update], in Ollon is; 690 children or 9.9% of the population are between 0 and 9 years old and 1,368 teenagers or 19.7% are between 10 and 19.

[10] The historical population is given in the following chart:[4][14] The Saint-Triphon Et Charpigny, a prehistoric to medieval hilltop settlement, is listed as a Swiss heritage site of national significance.

The entire villages of Huémoz and Ollon are part of the Inventory of Swiss Heritage Sites.

[15] In the 2007 federal election the most popular party was the SVP which received 26.43% of the vote.

In the federal election, a total of 1,602 votes were cast, and the voter turnout was 45.5%.

The number of jobs in the primary sector was 139, of which 124 were in agriculture and 15 were in forestry or lumber production.

In the tertiary sector; 224 or 16.4% were in wholesale or retail sales or the repair of motor vehicles, 110 or 8.0% were in the movement and storage of goods, 355 or 25.9% were in a hotel or restaurant, 5 or 0.4% were in the information industry, 28 or 2.0% were the insurance or financial industry, 66 or 4.8% were technical professionals or scientists, 387 or 28.3% were in education and 8 or 0.6% were in health care.

[10] From the 2000 census[update], 1,922 or 30.7% were Roman Catholic, while 2,603 or 41.6% 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.

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