|• Total||8.75 km2 (3.38 sq mi)|
|Elevation||870 m (2,850 ft)|
|• Density||40/km2 (100/sq mi)|
|Surrounded by||Bauma, Fischingen (TG), Fischenthal, Mosnang (SG), Wila|
Before the merger, Sternenberg had a total area of 8.7 km2 (3.4 sq mi). Of this area, 37.9% is used for agricultural purposes, while 58% is forested. Of the rest of the land, 3.8% is settled (buildings or roads) and the remainder (0.2%) is non-productive (rivers, glaciers or mountains). In 1996[update] housing and buildings made up 2.3% of the total area, while transportation infrastructure made up the rest (1.5%). Of the total unproductive area, water (streams and lakes) made up 0% of the area. As of 2007[update] 0.9% of the total municipal area was undergoing some type of construction.
Sternenberg had a population (as of 2013) of 351. As of 2007[update], 4.0% of the population was made up of foreign nationals. As of 2008[update] the gender distribution of the population was 51.3% male and 48.7% female. Over the last 10 years the population has decreased at a rate of -1.4%. Most of the population (as of 2000[update]) speaks German (98.0%), with French being second most common ( 0.3%) and English being third ( 0.3%).
The age distribution of the population (as of 2000[update]) is children and teenagers (0–19 years old) make up 24.6% of the population, while adults (20–64 years old) make up 58.2% and seniors (over 64 years old) make up 17.2%. In Sternenberg about 76.5% of the population (between age 25-64) have completed either non-mandatory upper secondary education or additional higher education (either university or a Fachhochschule). There are 140 households in Sternenberg.
Sternenberg has an unemployment rate of 1.8%. As of 2005[update], there were 48 people employed in the primary economic sector and about 22 businesses involved in this sector. 33 people are employed in the secondary sector and there are 9 businesses in this sector. 46 people are employed in the tertiary sector, with 11 businesses in this sector. As of 2007[update] 41% of the working population were employed full-time, and 59% were employed part-time.
As of 2008[update] there were 59 Catholics and 206 Protestants in Sternenberg. In the 2000 census, religion was broken down into several smaller categories. From the census[update], 65.6% were some type of Protestant, with 62.2% belonging to the Swiss Reformed Church and 3.4% belonging to other Protestant churches. 13.5% of the population were Catholic. Of the rest of the population, 0% were Muslim, 2% belonged to another religion (not listed), 2.6% did not give a religion, and 16% were atheist or agnostic.
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