Uithoorn (Dutch pronunciation: [œytˈɦoːr(ə)n] ⓘ) is a municipality and a town in the Netherlands, in the province of North Holland.

From c. 1600 on, peat extraction became important and resulted in the formation of large ponds, which in turn would be made into polders later on.

Its economy was limited, but improved in the middle of the 19th century when some industries (including chemical) were established in the area.

A sulphuric acid plant was established on the banks of the Amstel in 1863, it closed in the early 1900s; in 1922 the site was used for a coal tar processor, Teerbedrijf Uithoorn, later known as Cindu Chemicals.

[5][8] After World War II, Uithoorn developed quickly: in 1948 the Thamerdal neighbourhood was built, followed by Zijdelwaard in 1960, Legmeer in 1972, Meerwijk-West and Meerwijk-Oost from 1985 on.