Nieuwveen is a town in the Dutch province of South Holland, located close to the border of province North Holland, about 35 kilometers (22 miles) southwest of the city of Amsterdam. It is a part of the municipality of Nieuwkoop (until 2007: Liemeer), and lies about 9 kilometers (6 miles) northeast of Alphen aan den Rijn.
In 2001, the town of Nieuwveen had 2806 inhabitants. The built-up area of the town was 0.73 km², and contained 931 residences. The statistical area "Nieuwveen", which also can include the peripheral parts of the village, as well as the surrounding countryside, has a population of around 3630.
Zevenhoven was added to the municipality of Nieuwveen in 1991, and the municipality was renamed Liemeer in 1994. The Jostiband Orchestra was founded here.