Of the population in the municipality, 92 or about 27.8% were born in Zielebach and lived there in 2000. There were 109 or 32.9% who were born in the same canton, while 102 or 30.8% were born somewhere else in Switzerland, and 20 or 6.0% were born outside of Switzerland.
Of the municipality's population, 92 or about 27.8% were born in Zielebach and resided there in 2000.  109 or 32.9% were born within the same canton, while 102 or 30.8% were born elsewhere in Switzerland, and 20 or 6.0% were born outside of Switzerland.