Kleinlützel (French: Petit-Lucelle) is a municipality in the district of Thierstein in the canton of Solothurn in Switzerland.

In 1207 it was mentioned as de Minori Luzela and in 1288 as Kleinen Lützel.

[3] Kleinlützel has an area, as of 2009[update], of 16.29 square kilometers (6.29 sq mi).

It is an exclave of the Canton of Solothurn along the Lützeltalstrasse (French: Laufen-Pruntrut).

It consists of the village of Kleinlützel and the hamlets of Ober- and Nieder-Huggerwald and Ring as well as the former nun's convent of Klösterli.

The blazon of the municipal coat of arms is Or a Fess wavy Azure and in chief a Mullet of Five Gules.

[8] Most of the population (as of 2000[update]) speaks German (1,154 or 92.8%), with Italian being second most common (22 or 1.8%) and French being third (12 or 1.0%).

[9] As of 2008[update], the gender distribution of the population was 48.8% male and 51.2% female.

[7] The age distribution, as of 2000[update], in Kleinlützel is; 105 children or 8.4% of the population are between 0 and 6 years old and 187 teenagers or 15.0% 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 SVP which received 25.35% of the vote.

In the federal election, a total of 450 votes were cast, and the voter turnout was 46.5%.

[8] There were 599 residents of the municipality who were employed in some capacity, of which females made up 37.2% of the workforce.

In 2008[update] the total number of full-time equivalent jobs was 307.

In the tertiary sector; 11 or 20.4% were in wholesale or retail sales or the repair of motor vehicles, 10 or 18.5% were in the movement and storage of goods, 7 or 13.0% were in a hotel or restaurant, 4 or 7.4% were in the information industry, 1 was the insurance or financial industry, 5 or 9.3% were technical professionals or scientists, 11 or 20.4% were in education and 1 was in health care.

[8] From the 2000 census[update], 913 or 73.5% were Roman Catholic, while 158 or 12.7% 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 Kleinlützel attend their school in a neighboring municipality.