Montsevelier has a population (as of 2011) of 508.
 As of 2008, 1.8% of the population are resident foreign nationals.
 Over the last 10 years (2000–2010) the population has changed at a rate of -4.9%.
 Migration accounted for -6.4%, while births and deaths accounted for -0.2%.

Most of the population (as of 2000) speaks French (484 or 96.2%) as their first language, German is the second most common (16 or 3.2%) and English is the third (1 or 0.2%).

As of 2008, the population was 49.4% male and 50.6% female.
 The population was made up of 242 Swiss men (48.2% of the population) and 6 (1.2%) non-Swiss men.
 There were 250 Swiss women (49.8%) and 4 (0.8%) non-Swiss women.
 Of the population in the municipality, 329 or about 65.4% were born in Montsevelier and lived there in 2000.
 There were 101 or 20.1% who were born in the same canton, while 59 or 11.7% were born somewhere else in Switzerland, and 10 or 2.0% were born outside of Switzerland.

As of 2000, children and teenagers (0–19 years old) make up 24.3% of the population, while adults (20–64 years old) make up 59.2% and seniors (over 64 years old) make up 16.5%.

As of 2000, there were 216 people who were single and never married in the municipality.
 There were 251 married individuals, 24 widows or widowers and 12 individuals who are divorced.

As of 2000, there were 183 private households in the municipality, and an average of 2.7 persons per household.
 There were 38 households that consist of only one person and 23 households with five or more people.
 In 2000, a total of 179 apartments (91.8% of the total) were permanently occupied, while 11 apartments (5.6%) were seasonally occupied and 5 apartments (2.6%) were empty.
 As of 2009, the construction rate of new housing units was 2 new units per 1000 residents.
 The vacancy rate for the municipality, in 2010, was 1.4%.

The historical population is given in the following chart:
Montsevelier has a population (as of 2011) of 508.  As of 2008, 1.8% of the population are resident foreign nationals.  Over the last 10 years (2000–2010) the population has changed at a rate of -4.9%.  Migration accounted for -6.4%, while births and deaths accounted for -0.2%.
Most of the population (as of 2000) speaks French (484 or 96.2%) as their first language, German is the second most common (16 or 3.2%) and English is the third (1 or 0.2%).
As of 2008, the population was 49.4% male and 50.6% female.  The population was made up of 242 Swiss men (48.2% of the population) and 6 (1.2%) non-Swiss men.  There were 250 Swiss women (49.8%) and 4 (0.8%) non-Swiss women.  Of the population in the municipality, 329 or about 65.4% were born in Montsevelier and lived there in 2000.  There were 101 or 20.1% who were born in the same canton, while 59 or 11.7% were born somewhere else in Switzerland, and 10 or 2.0% were born outside of Switzerland.
As of 2000, children and teenagers (0–19 years old) make up 24.3% of the population, while adults (20–64 years old) make up 59.2% and seniors (over 64 years old) make up 16.5%.
As of 2000, there were 216 people who were single and never married in the municipality.  There were 251 married individuals, 24 widows or widowers and 12 individuals who are divorced.
As of 2000, there were 183 private households in the municipality, and an average of 2.7 persons per household.  There were 38 households that consist of only one person and 23 households with five or more people.  In 2000, a total of 179 apartments (91.8% of the total) were permanently occupied, while 11 apartments (5.6%) were seasonally occupied and 5 apartments (2.6%) were empty.  As of 2009, the construction rate of new housing units was 2 new units per 1000 residents.  The vacancy rate for the municipality, in 2010, was 1.4%.
The historical population is given in the following chart:
Montsevelier