Niedermuhlern has a population (as of December 2018) of 501.
As of 2012, 4.6% of the population are resident foreign nationals.
Over the last 2 years (2010-2012) the population has changed at a rate of -0.6%.
Migration accounted for -1.3%, while births and deaths accounted for -0.2%.

Most of the population (as of 2000) speaks German (521 or 99.6%) as their first language.
One person speaks French and another speaks Spanish as their first languages.

As of 2008, the population was 53.0% male and 47.0% female.
The population was made up of 238 Swiss men (51.3% of the population) and 8 (1.7%) non-Swiss men.
There were 216 Swiss women (46.6%) and 2 (0.4%) non-Swiss women.
Of the population in the municipality, 220 or about 42.1% were born in Niedermuhlern and lived there in 2000.
There were 237 or 45.3% who were born in the same canton, while 42 or 8.0% were born somewhere else in Switzerland, and 6 or 1.1% were born outside of Switzerland.

As of 2012, children and teenagers (0-19 years old) make up 19.7% of the population, while adults (20-64 years old) make up 63.8% and seniors (over 64 years old) make up 16.5%.

As of 2000, there were 239 people who were single and never married in the municipality.
There were 251 married individuals, 24 widows or widowers and 9 individuals who are divorced.

As of 2010, there were 51 households that consist of only one person and 13 households with five or more people.
In 2000, a total of 176 apartments (86.3% of the total) were permanently occupied, while 20 apartments (9.8%) were seasonally occupied and 8 apartments (3.9%) were empty.
The vacancy rate for the municipality, in 2013, was 2.1459227468%.
In 2011, single family homes made up 24.7% of the total housing in the municipality.

The historical population is given in the following chart:
Niedermuhlern has a population (as of December 2018) of 501. As of 2012, 4.6% of the population are resident foreign nationals. Over the last 2 years (2010-2012) the population has changed at a rate of -0.6%. Migration accounted for -1.3%, while births and deaths accounted for -0.2%.
Most of the population (as of 2000) speaks German (521 or 99.6%) as their first language. One person speaks French and another speaks Spanish as their first languages.
As of 2008, the population was 53.0% male and 47.0% female. The population was made up of 238 Swiss men (51.3% of the population) and 8 (1.7%) non-Swiss men. There were 216 Swiss women (46.6%) and 2 (0.4%) non-Swiss women. Of the population in the municipality, 220 or about 42.1% were born in Niedermuhlern and lived there in 2000. There were 237 or 45.3% who were born in the same canton, while 42 or 8.0% were born somewhere else in Switzerland, and 6 or 1.1% were born outside of Switzerland.
As of 2012, children and teenagers (0-19 years old) make up 19.7% of the population, while adults (20-64 years old) make up 63.8% and seniors (over 64 years old) make up 16.5%.
As of 2000, there were 239 people who were single and never married in the municipality. There were 251 married individuals, 24 widows or widowers and 9 individuals who are divorced.
As of 2010, there were 51 households that consist of only one person and 13 households with five or more people. In 2000, a total of 176 apartments (86.3% of the total) were permanently occupied, while 20 apartments (9.8%) were seasonally occupied and 8 apartments (3.9%) were empty. The vacancy rate for the municipality, in 2013, was 2.1459227468%. In 2011, single family homes made up 24.7% of the total housing in the municipality.
The historical population is given in the following chart:
Niedermuhlern