| Rijswijk | |
| Other Name: | Ryswick |
| Settlement Type: | Town and municipality |
| Image Alt: | Towpath (Jaagpad) |
| Flag Size: | 100x67px |
| Map Alt: | Highlighted position of Rijswijk in a municipal map of South Holland |
| Coordinates: | 52.0333°N 23°W |
| Subdivision Type: | Country |
| Subdivision Name: | Netherlands |
| Subdivision Type1: | Province |
| Subdivision Name1: | South Holland |
| Government Footnotes: | [1] |
| Governing Body: | Municipal council |
| Leader Title: | Mayor |
| Leader Name: | Huri Sahin |
| Unit Pref: | Metric |
| Elevation Footnotes: | [2] |
| Elevation M: | 0 |
| Population Demonym: | Rijswijker |
| Timezone1: | CET |
| Utc Offset1: | +1 |
| Timezone1 Dst: | CEST |
| Utc Offset1 Dst: | +2 |
| Postal Code Type: | Postcode |
| Postal Code: | 2280–2289 |
| Area Code Type: | Area code |
| Area Code: | 070 |
Rijswijk (in Dutch; Flemish ˈrɛisʋɛik/), formerly known as Ryswick in English, is a town and municipality in the western Netherlands, in the province of South Holland. Its population was 59.642 in 2024, and it has an area of NaNRijswijk}}, NaNRijswijk}} of which is water.
The municipality also includes the former hamlets of 't Haantje and Sion, currently also known as Rijswijk-Buiten.
62% Dutch background, 38% No Dutch background
Archeological excavations indicate that this area of the coastal dunes was already inhabited some 5500 years ago. The village of Rijswijk formed in the 13th century, and its history was dominated by the presence of mansions and estates of the nobility and affluent.
The Treaty of Ryswick was signed at the Huis ter Nieuwburg in 1697, ending the Nine Years' War. A monument, the Needle of Rijswijk (1792), was erected to commemorate the treaty in the Rijswijk Forest.
Until 1900 Rijswijk remained a relative small community but it became urbanized during the 20th century when it expanded rapidly. Today, Rijswijk's area has almost been completely built-up. The last major development is the new Ypenburg neighbourhood, built on the lands of the former Ypenburg Airfield but this part of Rijswijk was annexed by The Hague in 2002. Rijswijk is part of the Haaglanden conurbation. During the years its built-up area has grown to the point where it has effectively merged with The Hague, even though it is still a separate municipality.
Up until 2009 Rijswijk had a polytechnic college for applied sciences; TH Rijswijk (Technische Hogeschool Rijswijk). After a merger with the Haagse Hogeschool, this was moved to the campus of the TUDelft in Delft. The building still remains.
Istana Negara, one of the six presidential palaces of Indonesia, in the Jakarta neighbourhood of Harmoni (formerly Rijswijk-Molenvliet), was called Paleis te Rijswijk during Dutch colonial times.
Rijswijk is home to:
The largest shopping center is called 'In de Bogaard' and smaller shops are located in the old town center (Herenstraat). There is the old Schaapweimolen (windmill). De Broodfabriek holds many fairs and events.