 Of the population in the municipality, 873 or about 45.4% were born in St. Antoni and lived there in 2000.There were 622 or 32.3% who were born in the same canton, while 288 or 15.0% were born somewhere else in Switzerland, and 82 or 4.3% were born outside of Switzerland., children and teenagers (0–19 years old) make up 25.4% of the population, while adults (20–64 years old) make up 64.7% and seniors (over 64 years old) make up 9.9%.