|Population||2,475 (Dec 2013)|
|- Density||497 /km2 (1,287 /sq mi)|
|Area||5.01 km2 (1.93 sq mi)|
|Elevation||409 m (1,342 ft)|
|Surrounded by||Affoltern am Albis, Aristau (AG), Jonen (AG), Merenschwand (AG), Obfelden|
Ottenbach is first mentioned in 831 as in loco vocato marcha Hotumbacharia. In 1169 it was mentioned as Arnoldus de Ottonbac.
Ottenbach has an area of 5 km2 (1.9 sq mi). Of this area, 56.4% is used for agricultural purposes, while 20.7% is forested. Of the rest of the land, 19.1% is settled (buildings or roads) and the remainder (3.8%) is non-productive (rivers, glaciers or mountains).
Ottenbach has a population (as of 31 December 2013) of 2,475. As of 2007[update], 7.3% of the population was made up of foreign nationals. Over the last 10 years the population has grown at a rate of 5.5%. Most of the population (as of 2000[update]) speaks German (93.6%), with Italian being second most common ( 1.7%) and English being third ( 1.0%).
The age distribution of the population (as of 2000[update]) is children and teenagers (0–19 years old) make up 26.1% of the population, while adults (20–64 years old) make up 64.4% and seniors (over 64 years old) make up 9.6%. In Ottenbach about 84.9% of the population (between age 25-64) have completed either non-mandatory upper secondary education or additional higher education (either university or a Fachhochschule).
Ottenbach has an unemployment rate of 2.04%. As of 2005[update], there were 47 people employed in the primary economic sector and about 21 businesses involved in this sector. 144 people are employed in the secondary sector and there are 19 businesses in this sector. 388 people are employed in the tertiary sector, with 82 businesses in this sector. The historical population is given in the following table:
|Wikimedia Commons has media related to Ottenbach.|
- Official website (German)