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

[3] Penthalaz has an area, as of 2009[update], of 3.87 square kilometers (1.49 sq mi).

Of the rest of the land, 0.98 km2 (0.38 sq mi) or 25.3% is settled (buildings or roads), 0.06 km2 (15 acres) or 1.6% is either rivers or lakes.

while parks, green belts and sports fields made up 2.3%.

The blazon of the municipal coat of arms is Per pale Azure and Or, overall a Bend wavy Argent, two Mining-wheels counterchanged.

[9] Most of the population (as of 2000[update]) speaks French (2,000 or 87.6%), with German being second most common (64 or 2.8%) and Portuguese being third (53 or 2.3%).

[8] The age distribution, as of 2009[update], in Penthalaz is; 285 children or 10.0% of the population are between 0 and 9 years old and 312 teenagers or 10.9% 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 SP which received 28.91% of the vote.

In the federal election, a total of 626 votes were cast, and the voter turnout was 40.3%.

[9] There were 1,169 residents of the municipality who were employed in some capacity, of which females made up 44.1% of the workforce.

In the tertiary sector; 112 or 31.2% were in wholesale or retail sales or the repair of motor vehicles, 9 or 2.5% were in the movement and storage of goods, 27 or 7.5% were in a hotel or restaurant, 26 or 7.2% were in the information industry, 4 or 1.1% were the insurance or financial industry, 33 or 9.2% were technical professionals or scientists, 17 or 4.7% were in education and 46 or 12.8% were in health care.

[9] From the 2000 census[update], 590 or 25.8% were Roman Catholic, while 1,181 or 51.7% 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.

[17] During the school year, the political district provided pre-school care for a total of 296 children of which 96 children (32.4%) received subsidized pre-school care.

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

[16] The municipality has a railway station, Cossonay-Penthalaz, on the Jura Foot and Simplon lines.

The lower funicular station is called Cossonay-Gare, but is in the village of Penthalaz.