Numansdorp is a village and former municipal in the province South Holland in the Netherlands and is located on the island Hoeksche Waard near the Hollands Diep. At 1 January 1984, the municipal Numansdorp and the municipal Klaaswaal were merged in one municipal called Cromstrijen.
Numansdorp was founded in 1642. The village was built in the Numanspolder. It took a while till the embankment of this polder was started. The reason for the delay was a disagreement between the Lords of Cromstrijen and the owners of Zuid-Beijerland. When the founding of the village had finally taken place, it still didn't have an official name, even though the locals called it Buitensluis.
In a meeting it was decided to call the village Village of Cromstrijen (Dorp van Cromstrijen). But Dijkgraaf Vos, the chairman of the meeting, believed the village should me named after the first Ambachtsheer, Gerard Numan.
The first buildings of the village were built around the drainage sluice at the Numanspolderdijk (now called Molendijk) and from there the town spread along the Binnenhaven. The main street, Voorstraat, was expanded with several crossing streets. In 1647, at the end of one of those crossing streets called the Kerkstraat, a church was built.