| Table . Population and Density by Province: 1931 census | |||
| District | Population | Area(km.²) | Population per sq km |
| 12 districts | 95,428 | 32,120 | 2.97 |
| Choiseul | 4,051 | 2,540 | 1.59 |
| Eastern Solomons | 7,594 | 4,660 | 1.63 |
| Gizo | 7,318 | 5,180 | 1.41 |
| Guadalcanal | 14,300 | 6,470 | 2.21 |
| Lord Howe | 750 | ||
| Malaita | 40,121 | 4,070 | 9.86 |
| Nggela and Savo | 5,541 | 610 | 9.08 |
| Rennell and Bellona Islands | 1,500 | ||
| Santa Cruz | 5,098 | 960 | 5.31 |
| Shortlands | 1,346 | 520 | 2.59 |
| Sikaiana (Stewart) | 235 | ||
| Ysabel and Cape Marsh | 5,768 | 4,670 | 1.24 |
| Source: Encyclopędia Britannica World Atlas, 1951 edition | |||