| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Radiu | city | Vaslui | Romania | 46.70 | 27.40 | 830 | 4351 |
| Radium | city | Limpopo | South Africa | -25.09 | 28.31 | 3566 | 995 |
| Radium | city | Arizona | United States | 33.45 | -110.82 | 3398 | |
| Radium | city | Kansas | United States | 38.17 | -98.89 | 1971 | |
| Radium | city | Minnesota | United States | 48.23 | -96.61 | 921 | |
| Radium | city | Texas | United States | 32.83 | -100.00 | 1712 | |
| Radium | city | Virginia | United States | 36.73 | -77.63 | 200 | |
| Radium Gardens | city | Georgia | United States | 31.53 | -84.13 | 157 | |
| Radium Hill | city | South Australia | Australia | -32.30 | 140.67 | 830 | 0 |
| Radium Hill | city | South Australia | Australia | -32.33 | 140.61 | 830 | 0 |
| Radium Hot Springs | city | British Columbia | Canada | 50.62 | -116.10 | 2618 | 1177 |
| Radium Hot Springs Airport | airport | 50.63 | -116.10 | 2650 | 0 | ||
| Radium Springs | city | Georgia | United States | 31.53 | -84.14 | 147 | |
| Radium Springs | city | New Mexico | United States | 32.50 | -106.93 | 4189 |