Leidsche Rijn is a neighbourhood in the west of Utrecht in the central Netherlands. It consists of two parts, Leidsche Rijn and Vleuten-De Meern. The neighbourhood is expected to be completed in 2025 and will have approximately 80,000 inhabitants.
By 2007 the neighbourhoods of Veldhuizen, Parkwijk, Langerak and large parts of Terwijde were inhabited.
During construction several archeological remains were discovered. In 1997 and in 2003 Roman ships were discovered in the neighbourhood of De Balije. In 2002 and 2003 Roman watchtowers were discovered in the neighbourhoods of Vleuterweide and Het Zand.
The centre of this new neighbourhood will be situated above the Rijksweg A2 and will possibly include a few high-rise structures. There are about 35,000 people living in Leidsche Rijn as of the end of 2015 .
In 2015 Castellum Hoge Woerd opened its doors. On the spot where Romans guarded the river from a fort, now a modern interpretation of the fort with ramparts of six metres high has been build: Castellum Hoge Woerd. Behind the high walls are an archaeological museum, stables and an educational centre for nature and environmental education, a theater and a cafe-restaurant.