, the gender distribution of the population was 49.8% male and 50.2% female. The population was made up of 417 Swiss men (44.2% of the population) and 53 (5.6%) non-Swiss men. There were 426 Swiss women (45.2%) and 47 (5.0%) non-Swiss women. Of the population in the municipality 326 or about 37.5% were born in Büren and lived there in 2000. There were 67 or 7.7% who were born in the same canton, while 382 or 43.9% were born somewhere else in Switzerland, and 74 or 8.5% were born outside of Switzerland.