Rüschegg has a population (as of December 2018) of 1,662.
As of 2011, 3.3% of the population are resident foreign nationals.
Over the last year (2010-2011) the population has changed at a rate of -0.1%.
Migration accounted for -3.6%, while births and deaths accounted for 0.2%.

Most of the population (as of 2000) speaks German (1,585 or 97.4%) as their first language, English is the second most common (9 or 0.6%) and Albanian is the third (9 or 0.6%).
There are 8 people who speak French, 2 people who speak Italian and 1 person who speaks Romansh.

As of 2008, the population was 49.3% male and 50.7% female.
The population was made up of 790 Swiss men (47.7% of the population) and 27 (1.6%) non-Swiss men.
There were 818 Swiss women (49.4%) and 21 (1.3%) non-Swiss women.

Of the population in the municipality, 715 or about 43.9% were born in Rüschegg and lived there in 2000.
There were 602 or 37.0% who were born in the same canton, while 178 or 10.9% were born somewhere else in Switzerland, and 93 or 5.7% were born outside of Switzerland.
As of 2011, children and teenagers (0–19 years old) make up 19.2% of the population, while adults (20–64 years old) make up 61.3% and seniors (over 64 years old) make up 19.5%.

As of 2000, there were 670 people who were single and never married in the municipality.
There were 777 married individuals, 117 widows or widowers and 64 individuals who are divorced.

As of 2010, there were 222 households that consist of only one person and 46 households with five or more people.
In 2000, a total of 610 apartments (67.9% of the total) were permanently occupied, while 225 apartments (25.0%) were seasonally occupied and 64 apartments (7.1%) were empty.
As of 2010, the construction rate of new housing units was 2.4 new units per 1000 residents.
The vacancy rate for the municipality, in 2010, was 3.35%.
In 2011, single family homes made up 51.5% of the total housing in the municipality.

The historical population is given in the following chart:
Rüschegg has a population (as of December 2018) of 1,662. As of 2011, 3.3% of the population are resident foreign nationals. Over the last year (2010-2011) the population has changed at a rate of -0.1%. Migration accounted for -3.6%, while births and deaths accounted for 0.2%.
Most of the population (as of 2000) speaks German (1,585 or 97.4%) as their first language, English is the second most common (9 or 0.6%) and Albanian is the third (9 or 0.6%). There are 8 people who speak French, 2 people who speak Italian and 1 person who speaks Romansh.
As of 2008, the population was 49.3% male and 50.7% female. The population was made up of 790 Swiss men (47.7% of the population) and 27 (1.6%) non-Swiss men. There were 818 Swiss women (49.4%) and 21 (1.3%) non-Swiss women.
Of the population in the municipality, 715 or about 43.9% were born in Rüschegg and lived there in 2000. There were 602 or 37.0% who were born in the same canton, while 178 or 10.9% were born somewhere else in Switzerland, and 93 or 5.7% were born outside of Switzerland. As of 2011, children and teenagers (0–19 years old) make up 19.2% of the population, while adults (20–64 years old) make up 61.3% and seniors (over 64 years old) make up 19.5%.
As of 2000, there were 670 people who were single and never married in the municipality. There were 777 married individuals, 117 widows or widowers and 64 individuals who are divorced.
As of 2010, there were 222 households that consist of only one person and 46 households with five or more people. In 2000, a total of 610 apartments (67.9% of the total) were permanently occupied, while 225 apartments (25.0%) were seasonally occupied and 64 apartments (7.1%) were empty. As of 2010, the construction rate of new housing units was 2.4 new units per 1000 residents. The vacancy rate for the municipality, in 2010, was 3.35%. In 2011, single family homes made up 51.5% of the total housing in the municipality.
The historical population is given in the following chart:
Rüschegg