The area of what is now Sindi was the site of the
Mesolithic settlement of
Pulli, dating from around 8500 BCE – the oldest known settlement in Estonia. It was discovered by geologists in 1965. The settlement probably existed for a short period, as the area was later covered by water. As a swampy region, the area remained unpopulated until the 16th century. The town's name is derived from
Clauss Zindt, a mayor of Pärnu in 1565, who founded a manor (Zintenhof) where the town is now. The settlement was formed in 1833 around a textile factory owned by the manor. It officially became a borough in 1921 and a town in 1938. Important to the town's development was the founding of a railway station in 1928. The railway operated until 1970. ==Geography==