Gunzgen is a municipality in the district of Olten in the canton of Solothurn in Switzerland.

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

[4] The municipality is located in the Olten district, in the Mittelgäu along the Dünnern river.

The municipal borders changed during the Dünnern River Correction in 1933–43.

The blazon of the municipal coat of arms is Per fess Argent an Oak issuant leaved and acorned Vert and Azure a Mill Wheel Or.

[7] The age distribution, as of 2000[update], in Gunzgen is; 121 children or 8.5% of the population are between 0 and 6 years old and 241 teenagers or 16.9% are between 7 and 19.

[8] The historical population is given in the following chart:[3][13] In the 2007 federal election the most popular party was the CVP which received 46.45% of the vote.

In the federal election, a total of 575 votes were cast, and the voter turnout was 49.8%.

[8] There were 826 residents of the municipality who were employed in some capacity, of which females made up 42.7% of the workforce.

In 2008[update] the total number of full-time equivalent jobs was 693.

The number of jobs in the primary sector was 20, of which 17 were in agriculture and 3 were in forestry or lumber production.

The number of jobs in the secondary sector was 197 of which 98 or (49.7%) were in manufacturing, 14 or (7.1%) were in mining and 81 (41.1%) were in construction.

In the tertiary sector; 47 or 9.9% were in wholesale or retail sales or the repair of motor vehicles, 303 or 63.7% were in the movement and storage of goods, 67 or 14.1% were in a hotel or restaurant, 13 or 2.7% were in the information industry, 2 or 0.4% were the insurance or financial industry, 3 or 0.6% were technical professionals or scientists, 21 or 4.4% were in education.

[8] From the 2000 census[update], 759 or 53.2% were Roman Catholic, while 344 or 24.1% 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 Gunzgen attend their school in a neighboring municipality.