 Of the population in the municipality, 278 or about 24.8% were born in Erlach and lived there in 2000.There were 433 or 38.6% who were born in the same canton, while 198 or 17.6% were born somewhere else in Switzerland, and 162 or 14.4% were born outside of Switzerland., children and teenagers (0–19 years old) make up 20.6% of the population, while adults (20–64 years old) make up 61.8% and seniors (over 64 years old) make up 17.6%.