Erlenbach im Simmental has a population (as of December 2018) of 1,746.
 As of 2010, 5.1% of the population are resident foreign nationals.
 Over the last 10 years (2001-2011) the population has changed at a rate of -0.9%.
 Migration accounted for -1.2%, while births and deaths accounted for 0.2%.

Most of the population (as of 2000) speaks German (1,755 or 97.4%) as their first language, French is the second most common (14 or 0.8%) and Serbo-Croatian is the third (9 or 0.5%).
 There are 2 people who speak Italian and 1 person who speaks Romansh.

As of 2008, the population was 49.1% male and 50.9% female.
 The population was made up of 786 Swiss men (46.1% of the population) and 50 (2.9%) non-Swiss men.
 There were 831 Swiss women (48.8%) and 37 (2.2%) non-Swiss women.
 Of the population in the municipality, 707 or about 39.2% were born in Erlenbach im Simmental and lived there in 2000.
 There were 737 or 40.9% who were born in the same canton, while 177 or 9.8% were born somewhere else in Switzerland, and 94 or 5.2% were born outside of Switzerland.

As of 2011, children and teenagers (0–19 years old) make up 20% of the population, while adults (20–64 years old) make up 60.1% and seniors (over 64 years old) make up 19.9%.

As of 2000, there were 747 people who were single and never married in the municipality.
 There were 832 married individuals, 151 widows or widowers and 72 individuals who are divorced.

As of 2010, there were 232 households that consist of only one person and 45 households with five or more people.
 In 2000, a total of 685 apartments (83.7% of the total) were permanently occupied, while 98 apartments (12.0%) were seasonally occupied and 35 apartments (4.3%) were empty.
 The vacancy rate for the municipality, in 2012, was 1.09%.
 In 2011, single family homes made up 46.9% of the total housing in the municipality.

The historical population is given in the following chart:
Erlenbach im Simmental has a population (as of December 2018) of 1,746.  As of 2010, 5.1% of the population are resident foreign nationals.  Over the last 10 years (2001-2011) the population has changed at a rate of -0.9%.  Migration accounted for -1.2%, while births and deaths accounted for 0.2%.
Most of the population (as of 2000) speaks German (1,755 or 97.4%) as their first language, French is the second most common (14 or 0.8%) and Serbo-Croatian is the third (9 or 0.5%).  There are 2 people who speak Italian and 1 person who speaks Romansh.
As of 2008, the population was 49.1% male and 50.9% female.  The population was made up of 786 Swiss men (46.1% of the population) and 50 (2.9%) non-Swiss men.  There were 831 Swiss women (48.8%) and 37 (2.2%) non-Swiss women.  Of the population in the municipality, 707 or about 39.2% were born in Erlenbach im Simmental and lived there in 2000.  There were 737 or 40.9% who were born in the same canton, while 177 or 9.8% were born somewhere else in Switzerland, and 94 or 5.2% were born outside of Switzerland.
As of 2011, children and teenagers (0–19 years old) make up 20% of the population, while adults (20–64 years old) make up 60.1% and seniors (over 64 years old) make up 19.9%.
As of 2000, there were 747 people who were single and never married in the municipality.  There were 832 married individuals, 151 widows or widowers and 72 individuals who are divorced.
As of 2010, there were 232 households that consist of only one person and 45 households with five or more people.  In 2000, a total of 685 apartments (83.7% of the total) were permanently occupied, while 98 apartments (12.0%) were seasonally occupied and 35 apartments (4.3%) were empty.  The vacancy rate for the municipality, in 2012, was 1.09%.  In 2011, single family homes made up 46.9% of the total housing in the municipality.
The historical population is given in the following chart:
Erlenbach im Simmental