| name | type | Area (m²) | capital city | Country | continent | population (people) |
|---|---|---|---|---|---|---|
| Abia State | State | 6,320,000,000 | Nigeria | Africa | 2,833,999 | |
| Adamawa State | State | 36,916,998,144 | Nigeria | Africa | 3,737,223 | |
| Afar Region | State | 96,707,002,368 | Ethiopia | Africa | 1,602,995 | |
| Aguascalientes | State | 5,616,000,000 | Mexico | America | 1,237,675 | |
| Aimeliik | State | 52,000,000 | Palau | Oceania | 270 |