| Official Name: | Radium, Minnesota |
| Pushpin Map: | Minnesota#USA |
| Pushpin Label: | Radium |
| Pushpin Label Position: | right |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Minnesota |
| Subdivision Type2: | County |
| Subdivision Name2: | Marshall |
| Subdivision Type3: | Township |
| Subdivision Name3: | Comstock |
| Population Total: | 20 |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 925 |
| Coordinates: | 48.2294°N -96.6136°W |
| Area Code: | 218 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 649789 |
Radium is an unincorporated community in section 19 of Comstock Township, Marshall County, Minnesota, United States.[1] It was built alongside the Minneapolis, St. Paul and Sault Ste. Marie Railroad (Soo Line Railroad) branch line built in 1905 from Thief River Falls, Minnesota, to Kenmare, North Dakota. (This line still operates under the aegis of the Northern Plains Railroad.) The place was named for the element radium.[2] Radium had its own post office from 1905 to 1984.[3] Since 1984, Radium has been served by the post office in Warren. It is also on the Warren telephone exchange and part of the Warren-Alvarado-Oslo school district. The townsite is being slowly reclaimed for use as farmland. There is still a large grain elevator on the railroad line south of the townsite. A small Lutheran church south of the town antedates the coming of the railroad; Immanuel Lutheran Church (LCMS) was organized in 1897.