| Official Name: | Rajec |
| Pushpin Map: | Slovenia |
| Pushpin Label Position: | left |
| Pushpin Map Caption: | Location in Slovenia |
| Subdivision Type: | Country |
| Subdivision Name: | Slovenia |
| Subdivision Type1: | Traditional region |
| Subdivision Name1: | Lower Carniola |
| Subdivision Type2: | Statistical region |
| Subdivision Name2: | Lower Sava |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Brežice |
| Area Total Km2: | 1.26 |
| Population As Of: | 2020 |
| Population Total: | 69 |
| Population Density Km2: | auto |
| Population Blank1 Title: | Ethnicities |
| Population Blank2 Title: | Religions |
| Coordinates: | 45.8489°N 15.6757°W |
| Elevation M: | 232.5 |
| Footnotes: | [1] |
Rajec (in Slovenian pronounced as /ˈɾaːjəts/) is a settlement in the Municipality of Brežice in eastern Slovenia. The area is part of the traditional region of Lower Carniola. It is now included with the rest of the municipality in the Lower Sava Statistical Region.[2]
Mokrice Castle is a castle on a hill above the right bank of the Sava River in the northern part of the settlement. It was first mentioned in written documents dating to 1444, but the site has been occupied since Roman times. The castle was rebuilt in 1560 and is a three-storey rectangular building with a central arcaded courtyard and three defence towers. The castle chapel is dedicated to Saint Anne. The building has now been adapted and operates as a four-star hotel.[3]