Safnern has a population (as of December 2018) of 1,928.
 As of 2010, 5.2% of the population are resident foreign nationals.
 Over the last 10 years (2001-2011) the population has changed at a rate of 0%.
 Migration accounted for 0.6%, while births and deaths accounted for -0.1%.

Most of the population (as of 2000) speaks German (1,652 or 92.9%) as their first language, French is the second most common (81 or 4.6%) and Italian is the third (14 or 0.8%).

As of 2008, the population was 48.5% male and 51.5% female.
 The population was made up of 854 Swiss men (45.6% of the population) and 54 (2.9%) non-Swiss men.
 There were 921 Swiss women (49.2%) and 4 (0.2%) non-Swiss women.
 Of the population in the municipality, 457 or about 25.7% were born in Safnern and lived there in 2000.
 There were 827 or 46.5% who were born in the same canton, while 322 or 18.1% were born somewhere else in Switzerland, and 133 or 7.5% were born outside of Switzerland.

As of 2011, children and teenagers (0–19 years old) make up 22.2% of the population, while adults (20–64 years old) make up 58.6% and seniors (over 64 years old) make up 19.2%.

As of 2000, there were 658 people who were single and never married in the municipality.
 There were 946 married individuals, 92 widows or widowers and 83 individuals who are divorced.

As of 2010, there were 182 households that consist of only one person and 34 households with five or more people.
 In 2000, a total of 712 apartments (93.7% of the total) were permanently occupied, while 21 apartments (2.8%) were seasonally occupied and 27 apartments (3.6%) were empty.
 As of 2010, the construction rate of new housing units was 1.6 new units per 1000 residents.
 The vacancy rate for the municipality, in 2012, was 2.61%.
 In 2011, single family homes made up 68.8% of the total housing in the municipality.

The historical population is given in the following chart:
Safnern has a population (as of December 2018) of 1,928.  As of 2010, 5.2% of the population are resident foreign nationals.  Over the last 10 years (2001-2011) the population has changed at a rate of 0%.  Migration accounted for 0.6%, while births and deaths accounted for -0.1%.
Most of the population (as of 2000) speaks German (1,652 or 92.9%) as their first language, French is the second most common (81 or 4.6%) and Italian is the third (14 or 0.8%).
As of 2008, the population was 48.5% male and 51.5% female.  The population was made up of 854 Swiss men (45.6% of the population) and 54 (2.9%) non-Swiss men.  There were 921 Swiss women (49.2%) and 4 (0.2%) non-Swiss women.  Of the population in the municipality, 457 or about 25.7% were born in Safnern and lived there in 2000.  There were 827 or 46.5% who were born in the same canton, while 322 or 18.1% were born somewhere else in Switzerland, and 133 or 7.5% were born outside of Switzerland.
As of 2011, children and teenagers (0–19 years old) make up 22.2% of the population, while adults (20–64 years old) make up 58.6% and seniors (over 64 years old) make up 19.2%.
As of 2000, there were 658 people who were single and never married in the municipality.  There were 946 married individuals, 92 widows or widowers and 83 individuals who are divorced.
As of 2010, there were 182 households that consist of only one person and 34 households with five or more people.  In 2000, a total of 712 apartments (93.7% of the total) were permanently occupied, while 21 apartments (2.8%) were seasonally occupied and 27 apartments (3.6%) were empty.  As of 2010, the construction rate of new housing units was 1.6 new units per 1000 residents.  The vacancy rate for the municipality, in 2012, was 2.61%.  In 2011, single family homes made up 68.8% of the total housing in the municipality.
The historical population is given in the following chart:
Safnern