Wettswil am Albis has a population (as of ) of . , 11.3% of the population was made up of foreign nationals. Over the last 10 years the population has grown at a rate of 21.4%. Most of the population () speaks German (91.7%), with French being second most common ( 1.4%) and Italian being third ( 1.3%). In the 2007 election the most popular party was the
SVP which received 35.1% of the votes. The next three most popular parties were the
FDP (19%), the
SPS (15.4%) and the
CSP (10.7%). The age distribution of the population () is children and teenagers (0–19 years old) make up 21.5% of the population, while adults (20–64 years old) make up 65.5% and seniors (over 64 years old) make up 13%. In Wettswil am Albis about 88.6% of the population (between age 25-64) have completed either non-mandatory
upper secondary education or additional higher education (either university or a
Fachhochschule). Wettswil am Albis has an unemployment rate of 1.44%. , there were 61 people employed in the
primary economic sector and about 10 businesses involved in this sector. 357 people are employed in the
secondary sector and there are 29 businesses in this sector. 454 people are employed in the
tertiary sector, with 115 businesses in this sector. == Transport ==