 Of the population in the municipality, 435 or about 54.4% were born in Arbaz and lived there in 2000.There were 154 or 19.3% who were born in the same canton, while 113 or 14.1% were born somewhere else in Switzerland, and 88 or 11.0% were born outside of Switzerland., children and teenagers (0–19 years old) make up 24.8% of the population, while adults (20–64 years old) make up 56.1% and seniors (over 64 years old) make up 19.1%.