, the population was 50.6% male and 49.4% female. The population was made up of 206 Swiss men (50.1% of the population) and 2 (0.5%) non-Swiss men. There were 197 Swiss women (47.9%) and 6 (1.5%) non-Swiss women. Of the population in the municipality, 120 or about 29.1% were born in Iffwil and lived there in 2000. There were 202 or 48.9% who were born in the same canton, while 61 or 14.8% were born somewhere else in Switzerland, and 13 or 3.1% were born outside of Switzerland.