Onnens (Arpitan: Onens [uˈnɛ̃] ⓘ) is a municipality in the district of Jura-Nord Vaudois in the canton of Vaud in Switzerland.

[3] Onnens has an area, as of 2009[update], of 5.11 square kilometers (1.97 sq mi).

Of the rest of the land, 0.48 km2 (0.19 sq mi) or 9.4% is settled (buildings or roads).

[6] The blazon of the municipal coat of arms is Argent, a Crayfish Gulles declawed dexter.

The missing crayfish claw can be found on the coat of arms of Montagny-pres-Yverdon and represents the division of the two municipalities.

[10] Most of the population (as of 2000[update]) speaks French (354 or 89.2%), with German being second most common (18 or 4.5%) and Portuguese being third (8 or 2.0%).

[9] The age distribution, as of 2009[update], in Onnens is; 66 children or 14.7% of the population are between 0 and 9 years old and 50 teenagers or 11.1% are between 10 and 19.

The entire village of Onnens is part of the Inventory of Swiss Heritage Sites.

[15] In the 2007 federal election the most popular party was the SP which received 29.83% of the vote.

In the federal election, a total of 126 votes were cast, and the voter turnout was 44.1%.

[10] There were 200 residents of the municipality who were employed in some capacity, of which females made up 39.5% of the workforce.

The number of jobs in the primary sector was 27, of which 15 were in agriculture and 12 were in forestry or lumber production.

In the tertiary sector; 4 or 3.6% were in wholesale or retail sales or the repair of motor vehicles, 83 or 75.5% were in the movement and storage of goods, 13 or 11.8% were in a hotel or restaurant, 1 was in the information industry, 2 or 1.8% were technical professionals or scientists, 3 or 2.7% were in education.

[10] From the 2000 census[update], 90 or 22.7% were Roman Catholic, while 225 or 56.7% 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.