crossed black bulrushes with green stems and leaves on a white background. Demographics Thalwil has a population of 18,066 (as of 2019). , 21.4% of the population was made up of foreign nationals. , the gender distribution of the population was 48.5% male and 51.5% female. Over the last 10 years the population has grown at a rate of 6%. Most of the population () speaks German (84.0%), with Italian being second most common (4.5%) and English being third (2.3%). The age distribution of the population () is children and teenagers (0–19 years old) make up 18.8% of the population, while adults (20–64 years old) make up 65.6% and seniors (over 64 years old) make up 15.6%. In Thalwil about 81.5% of the population (between age 25–64) have completed either non-mandatory upper secondary education or additional higher education (either university or a Fachhochschule). There are 7,680 households in Thalwil. The historical population is given in the following table: Election results In the 2007 elections, the most popular party was the SVP, receiving 28.5% of the vote. The next three most popular parties were the SP (19.7%), the FDP (18.2%), and the CSP (11.4%). The most recent Swiss federal elections for the Nationalrat (National Council) and Ständerat (Council of States) took place in 2019. In the Nationalrat elections, the largest party in Thalwil was the SVP, with 21.6% of the vote. Five other parties received over a hundred votes. Those were, in order of descending votes: the FDP (20.1%), the GLP (14.8%), the SP (14.5%), the Greens (9.9%), and the CVP (now known as The Centre) (5.0%). In the canton-wide Ständerat election, Ruedi Noser of the FDP was reelected after the second round, winning 65.3% of votes in Thalwil. Churches in Thalwil Thalwil is one of the oldest parishes on the shores of Lake Zurich. It also has one of the most spectacular church locations, with the Platte affording views of the lake and its surroundings from Zurich to the Alps. The earliest recorded church was dedicated to St Martin in 1159. In medieval times it was a dependency of Wettingen Abbey. Although it was frequently hit by lightning and also looted and set on fire during the Old Zürich War (Alter Zürichkrieg), the original building survived for over six hundred years. In 1845, the small and rather dilapidated chapel was demolished and replaced by a much larger church designed by