, the gender distribution of the population was 50.9% male and 49.1% female. The population was made up of 107 Swiss men (48.6% of the population) and 5 (2.3%) non-Swiss men. There were 105 Swiss women (47.7%) and 3 (1.4%) non-Swiss women. Of the population in the municipality 110 or about 50.7% were born in Birgisch and lived there in 2000. There were 65 or 30.0% who were born in the same canton, while 27 or 12.4% were born somewhere else in Switzerland, and 13 or 6.0% were born outside of Switzerland. The age distribution of the population () is children and teenagers (0–19 years old) make up 24% of the population, while adults (20–64 years old) make up 59% and seniors (over 64 years old) make up 17.1%.