|Population||7,873 (Dec 2011)|
|- Density||1,514 /km2 (3,921 /sq mi)|
|Area||2.42 km2 (0.93 sq mi)|
|Elevation||408 m (1,339 ft)|
|Surrounded by||Altendorf, Galgenen, Jona (SG), Wangen|
|Twin towns||Schramberg (Germany)|
Lachen is first mentioned around 1217–22 as de Lachun.
Lachen has an area, as of 2006[update], of 2.4 km2 (0.93 sq mi). Of this area, 26.7% is used for agricultural purposes, while 5.8% is forested. Of the rest of the land, 62.1% is settled (buildings or roads) and the remainder (5.4%) is non-productive (rivers, glaciers or mountains).
The municipality is located on a delta of the Wägi river in the upper section of Lake Zurich. It is the smallest municipality in the Canton of Schwyz. The size of the village of Lachen and size of the municipality of Lachen is basically[vague] the same.
Lachen has a population (as of 31 December 2011) of 7,873. As of 2007[update], 27.2% of the population was made up of foreign nationals. Over the last 10 years the population has grown at a rate of 14.1%. Most of the population (as of 2000[update]) speaks German (84.9%), with Italian being second most common ( 5.1%) and Albanian being third ( 2.4%).
As of 2000[update] the gender distribution of the population was 49.1% male and 50.9% female. The age distribution, as of 2008[update], in Lachen is: 1,293 people or 20.6% of the population is between 0 and 19. 1,950 people or 31.1% are 20 to 39, and 2,055 people or 32.8% are 40 to 64. The senior population distribution is 489 people or 7.8% are 65 to 74. There are 347 people or 5.5% who are 70 to 79 and 138 people or 2.20% of the population who are over 80. There is one person in Lachen who is over 100 years old.
The entire Swiss population is generally well educated. In Lachen about 69.2% of the population (between age 25 and 64) have completed either non-mandatory upper secondary education or additional higher education (either university or a Fachhochschule).
Lachen has an unemployment rate of 1.98%. As of 2005[update], there were 61 people employed in the primary economic sector and about 7 businesses involved in this sector. 859 people are employed in the secondary sector and there are 84 businesses in this sector. 2,686 people are employed in the tertiary sector, with 370 businesses in this sector.
From the 2000 census[update], 4,141 or 66.0% are Roman Catholic, while 984 or 15.7% belonged to the Swiss Reformed Church. Of the rest of the population, there are 179 individuals (or about 2.85% of the population) who belong to the Orthodox Church, and there are less than 5 individuals who belong to another Christian church. There are less than 5 individuals who are Jewish, and 413 (or about 6.58% of the population) who are Islamic. There are 38 individuals (or about 0.61% of the population) who belong to another church (not listed on the census), 336 (or about 5.36% of the population) belong to no church, are agnostic or atheist, and 178 individuals (or about 2.84% of the population) did not answer the question.
The historical population is given in the following table:
Lachen has an average of 149.1 days of rain per year and on average receives 1,428 mm (56.2 in) of precipitation. The wettest month is August during which time Lachen receives an average of 186 mm (7.3 in) of precipitation. During this month there is precipitation for an average of 14.2 days. The month with the most days of precipitation is May, with an average of 14.7, but with only 139 mm (5.5 in) of precipitation. The driest month of the year is January with an average of 80 mm (3.1 in) of precipitation over 14.2 days.
|Preceding station||Zürich S-Bahn||Following station|
Famous citizens 
Joseph Joachim Raff (May 27, 1822 - June 24 or June 25, 1882) was born in Lachen.
- Swiss Federal Statistics Office – STAT-TAB Ständige und Nichtständige Wohnbevölkerung nach Region, Geschlecht, Nationalität und Alter (German) accessed 3 October 2012
- Arealstatistik Standard - Gemeindedaten nach 4 Hauptbereichen
- Lachen in German, French and Italian in the online Historical Dictionary of Switzerland.
- Swiss Federal Statistical Office accessed 02-Sep-2009
- Canton Schwyz Statistics (German) accessed 27 August 2009
- "Temperature and Precipitation Average Values-Table, 1961–1990" (in German, French, Italian). Federal Office of Meteorology and Climatology - MeteoSwiss. Retrieved 8 May 2009., the weather station elevation is 426 meters above sea level.
- Official website (German)
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