| Sint-Maartensdijk | |
| Settlement Type: | Village |
| Native Name Lang: | nl |
| Image Map1: | Map NL - Tholen - Sint Maartensdijk.png |
| Map Caption1: | The town centre (dark green) and the statistical district (light green) of Sint-Maartensdijk in the municipality of Tholen.--> |
| Pushpin Map: | Netherlands Zeeland#Netherlands |
| Pushpin Label Position: | left |
| Pushpin Mapsize: | 250 |
| Pushpin Map Caption: | Location in the province of Zeeland in the Netherlands |
| Subdivision Type: | Country |
| Subdivision Name: | Netherlands |
| Subdivision Type1: | Province |
| Subdivision Name1: | Zeeland |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Tholen |
| Elevation Footnotes: | [1] |
| Elevation M: | 1.0 |
| Area Total Km2: | 22.26 |
| Population Footnotes: | [2] |
| Population Total: | 3,440 |
| Population As Of: | 2021 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Postal Code Type: | Postal code |
| Postal Code: | 4695 |
| Area Code Type: | Dialing code |
| Area Code: | 0166 |
| Coordinates: | 51.5478°N 4.075°W |
Sint-Maartensdijk (in Dutch; Flemish pronounced as /ˈsɪnt ˈmaːr.tənsˌdɛik/) is a village in the Dutch province of Zeeland. It is a part of the municipality of Tholen, and lies about 16 km west of Bergen op Zoom.
Named after Saint Martin, Sint-Maartensdijk was founded as 'Haestinge', and renamed when it got a church dedicated to Martin of Tours. The first lords of Sint-Maartensdijk resided at Sint-Maartensdijk Castle which was demolished in 1819. The castle was located just north of the town walls, and its southern moat is still visible.
Sint-Maartensdijk was a separate municipality until 1971, when it was merged with Tholen.