 Of the population in the municipality, 529 or about 38.8% were born in Rohrbach and lived there in 2000.There were 553 or 40.5% who were born in the same canton, while 178 or 13.0% were born somewhere else in Switzerland, and 86 or 6.3% were born outside of Switzerland., children and teenagers (0–19 years old) make up 21.5% of the population, while adults (20–64 years old) make up 59.4% and seniors (over 64 years old) make up 19.1%.