Wassen has a population (as of 31 December 2018) of 398.
 As of 2007, 7.2% of the population was made up of foreign nationals.
 Over the last 10 years the population has decreased at a rate of -16%.
 Most of the population (as of 2000) speaks German  (94.2%), with Serbo-Croatian being second most common (2.4%) and Italian being third (1.3%).
 As of 2007 the gender distribution of the population was 51.8% male and 48.2% female.

In the 2007 federal election the FDP party received 85.9% of the vote.

In Wassen about 53% of the population (between age 25-64) have completed either non-mandatory upper secondary education or additional higher education (either university or a Fachhochschule).

Wassen has an unemployment rate of 0.64%.
 As of 2005, there were 43 people employed in the primary economic sector and about 18 businesses involved in this sector.
 34 people are employed in the secondary sector and there are 7 businesses in this sector.
 121 people are employed in the tertiary sector, with 18 businesses in this sector.

The historical population is given in the following table:
Wassen has a population (as of 31 December 2018) of 398.  As of 2007, 7.2% of the population was made up of foreign nationals.  Over the last 10 years the population has decreased at a rate of -16%.  Most of the population (as of 2000) speaks German  (94.2%), with Serbo-Croatian being second most common (2.4%) and Italian being third (1.3%).  As of 2007 the gender distribution of the population was 51.8% male and 48.2% female.
In the 2007 federal election the FDP party received 85.9% of the vote.
In Wassen about 53% of the population (between age 25-64) have completed either non-mandatory upper secondary education or additional higher education (either university or a Fachhochschule).
Wassen has an unemployment rate of 0.64%.  As of 2005, there were 43 people employed in the primary economic sector and about 18 businesses involved in this sector.  34 people are employed in the secondary sector and there are 7 businesses in this sector.  121 people are employed in the tertiary sector, with 18 businesses in this sector.
The historical population is given in the following table:
Wassen