 , the gender distribution of the population was 49.5% male and 50.5% female.The population was made up of 5113 Swiss citizens (82.7% of the population), and 1669 non-Swiss residents (17.3%) Of the population in the municipality 1489 or about 28.0% were born in Sissach and lived there in 2000.There were 1394 or 26.2% who were born in the same canton, while 1351 or 25.4% were born somewhere else in Switzerland, and 938 or 17.6% were born outside of Switzerland.