| Sluis | |
| Settlement Type: | Municipality |
| Flag Size: | 100x67px |
| Map Alt: | Highlighted position of Sluis in a municipal map of Zeeland |
| Coordinates: | 51.3083°N 3.3861°W |
| Subdivision Type: | Country |
| Subdivision Name: | Netherlands |
| Subdivision Type1: | Province |
| Subdivision Name1: | Zeeland |
| Government Footnotes: | [1] |
| Governing Body: | Municipal council |
| Leader Party: | CDA |
| Leader Title: | Mayor |
| Leader Name: | Marga Vermue-Vermue |
| Unit Pref: | Metric |
| Elevation Footnotes: | [2] |
| Elevation M: | 2 |
| Timezone1: | CET |
| Utc Offset1: | +1 |
| Timezone1 Dst: | CEST |
| Utc Offset1 Dst: | +2 |
| Postal Code Type: | Postcode |
| Postal Code: | 4500–4519, 4524–4529 |
| Area Code Type: | Area code |
| Area Code: | 0117 |
Sluis (in Dutch; Flemish slœys/; label=[[Zeelandic]]|Sluus pronounced as /slys/; French: Écluse) is a city and municipality located in the west of Zeelandic Flanders, in the south-western Dutch province of Zeeland.
The current incarnation of the municipality has existed since 1 January 2003. The former municipalities of Oostburg and Sluis-Aardenburg merged on that date. The latter of these two municipalities was formed from a merger between the previous municipality named Sluis and the former municipality of Aardenburg in 1995.
The town received city rights in 1290. In 1340 the Battle of Sluys was fought nearby at sea during the Hundred Years' War. There is a record of one of the first lotteries with money on 9 May 1455 of 1737 florins (US$170,000, in 2014).
During the Eighty Years' War in 1587 the town was captured by Spanish troops under the Duke of Parma and was retaken in 1604 by a Dutch and English force under Maurice of Nassau.
From 2006 until its closure in 2013, Oud Sluis was one of only two Michelin three-starred restaurants in the entire country.
In addition to the town of Sluis itself, the municipality is made up of the following population centres:
Sint Anna ter Muiden, with a population of only 50 (2001), is a small village about 1 km west of the town of Sluis, located on the westernmost point of the Netherlands.
The population of the city is 2,040 (as of 2001).
A ferry connection across the Westerschelde exists between Breskens and Vlissingen. After the opening of the Westerschelde tunnel near Terneuzen in 2003, the ferry now carries only pedestrian and bicycle traffic.