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.
The data shows that a significant portion of the population in the municipality was born in Zielebach (27.8%), with a substantial percentage also being born within the same canton (32.9%).  Additionally, there is a notable number of individuals who were born outside of Switzerland (30.8%).