Betten had a population (as of 2011) of 420.
 As of 2008, 7.6% of the population are resident foreign nationals.
 Over the last 10 years (2000–2010 ) the population has changed at a rate of -11.6%.
 It has changed at a rate of -16.6% due to migration and at a rate of -2% due to births and deaths.

Most of the population (as of 2000) speaks German (433 or 96.4%) as their first language, Serbo-Croatian is the second most common (5 or 1.1%) and French is the third (4 or 0.9%).
 There is 1 person who speaks Italian.

As of 2008, the population was made up of 367 Swiss citizens and 30 non-citizen residents (7.56% of the population).
 Of the population in the municipality, 272 or about 60.6% were born in Betten and lived there in 2000.
 There were 79 or 17.6% who were born in the same canton, while 53 or 11.8% were born somewhere else in Switzerland, and 25 or 5.6% were born outside of Switzerland.

As of 2000, children and teenagers (0–19 years old) make up 18% of the population, while adults (20–64 years old) make up 66.1% and seniors (over 64 years old) make up 15.8%.

As of 2000, there were 197 people who were single and never married in the municipality.
 There were 215 married individuals, 29 widows or widowers and 8 individuals who are divorced.

As of 2000, there were 180 private households in the municipality, and an average of 2.4 persons per household.
 There were 54 households that consist of only one person and 12 households with five or more people.
 In 2000, a total of 172 apartments (16.7% of the total) were permanently occupied, while 742 apartments (72.1%) were seasonally occupied and 115 apartments (11.2%) were empty.
 As of 2009, the construction rate of new housing units was 17.7 new units per 1000 residents.
 The vacancy rate for the municipality, in 2010, was 0.26%.

The historical population is given in the following chart:
Betten had a population (as of 2011) of 420.  As of 2008, 7.6% of the population are resident foreign nationals.  Over the last 10 years (2000–2010 ) the population has changed at a rate of -11.6%.  It has changed at a rate of -16.6% due to migration and at a rate of -2% due to births and deaths.
Most of the population (as of 2000) speaks German (433 or 96.4%) as their first language, Serbo-Croatian is the second most common (5 or 1.1%) and French is the third (4 or 0.9%).  There is 1 person who speaks Italian.
As of 2008, the population was made up of 367 Swiss citizens and 30 non-citizen residents (7.56% of the population).  Of the population in the municipality, 272 or about 60.6% were born in Betten and lived there in 2000.  There were 79 or 17.6% who were born in the same canton, while 53 or 11.8% were born somewhere else in Switzerland, and 25 or 5.6% were born outside of Switzerland.
As of 2000, children and teenagers (0–19 years old) make up 18% of the population, while adults (20–64 years old) make up 66.1% and seniors (over 64 years old) make up 15.8%.
As of 2000, there were 197 people who were single and never married in the municipality.  There were 215 married individuals, 29 widows or widowers and 8 individuals who are divorced.
As of 2000, there were 180 private households in the municipality, and an average of 2.4 persons per household.  There were 54 households that consist of only one person and 12 households with five or more people.  In 2000, a total of 172 apartments (16.7% of the total) were permanently occupied, while 742 apartments (72.1%) were seasonally occupied and 115 apartments (11.2%) were empty.  As of 2009, the construction rate of new housing units was 17.7 new units per 1000 residents.  The vacancy rate for the municipality, in 2010, was 0.26%.
The historical population is given in the following chart:
Betten