 About 17.7% of the workforce coming into Therwil are coming from outside Switzerland, while 0.4% of the locals commute out of Switzerland for work.Of the working population, 32.3% used public transportation to get to work, and 41.3% used a private car.From the , 3,219 or 38.2% were Roman Catholic, while 3,046 or 36.1% belonged to the Swiss Reformed Church.