 Of the population in the municipality, 987 or about 52.7% were born in Saint-Léonard and lived there in 2000.There were 531 or 28.4% who were born in the same canton, while 117 or 6.3% were born somewhere else in Switzerland, and 191 or 10.2% were born outside of Switzerland., children and teenagers (0–19 years old) make up 24.5% of the population, while adults (20–64 years old) make up 60.5% and seniors (over 64 years old) make up 15%.