Winznau is a municipality in the district of Gösgen in the canton of Solothurn in Switzerland.

Winznau has an area, as of 2009[update], of 3.94 square kilometers (1.52 sq mi).

[3] The blazon of the municipal coat of arms is Or a Vine Branch with five Leaves and two Vine-shoots Vert.

[7] Most of the population (as of 2000[update]) speaks German (1,594 or 93.8%), with Albanian being second most common (27 or 1.6%) and Italian being third (25 or 1.5%).

[8] As of 2008[update], the gender distribution of the population was 50.0% male and 50.0% female.

[6] The age distribution, as of 2000[update], in Winznau is; 140 children or 8.2% of the population are between 0 and 6 years old and 247 teenagers or 14.5% are between 7 and 19.

[7] The historical population is given in the following chart:[12] The Käsloch, a paleolithic cave, is listed as a Swiss heritage site of national significance.

[13] In the 2007 federal election the most popular party was the SVP which received 28.84% of the vote.

In the federal election, a total of 607 votes were cast, and the voter turnout was 50.5%.

[7] There were 905 residents of the municipality who were employed in some capacity, of which females made up 41.8% of the workforce.

In 2008[update] the total number of full-time equivalent jobs was 138.

In the tertiary sector; 23 or 32.9% were in wholesale or retail sales or the repair of motor vehicles, 10 or 14.3% were in the movement and storage of goods, 8 or 11.4% were in a hotel or restaurant, 1 was in the information industry, 3 or 4.3% were the insurance or financial industry, 2 or 2.9% were technical professionals or scientists, 8 or 11.4% were in education and 5 or 7.1% were in health care.

[7] From the 2000 census[update], 880 or 51.8% were Roman Catholic, while 413 or 24.3% belonged to the Swiss Reformed Church.

The education system in the Canton of Solothurn allows young children to attend two years of non-obligatory Kindergarten.

All the lower secondary students from Winznau attend their school in a neighboring municipality.