If the Inland Empire was its own country it would be the 125th largest in the world. With over 4.1 million inhabitants, the region (officially the “Riverside–San Bernardino–Ontario Metropolitan Statistical Area”) is larger in population than Uruguay, Armenia, and Kuwait, and slightly smaller than Ireland, New Zealand, and Lebanon.
| Region | Population |
| Singapore | 4.8 m |
| Norway | 4.8 m |
| Ireland | 4.4 m |
| New Zealand | 4.3 m |
| Lebanon | 4.2 m |
| Inland Empire | 4.1 m |
| Uruguay | 3.4 m |
| Armenia | 3.2 m |
| Kuwait | 3.0 m |
| Jamaica | 2.7 m |
| Mongolia | 3.0 m |