| Province | Departments | Area in Sq. Kilometres | Population, Census of December, 1920 |
| Tacna | Tacna, Arica, Tarata | 23,306 | 38,902 |
| Tarapacá | Tarapacá, Pisagua | 43,220 | 100,533 |
| Antofagasta | Antofagasta, Tocopilla, Taltal | 120,183 | 172,330 |
| Atacama | Copiapó, Chañaral, Freirina, Vallenar | 79,531 | 48,413 |
| Coquimbo | La Serena, Elqui, Ovalle, Coquimbo, Combarbalá, Illapel | 36,509 | 160,256 |
| Aconcagua | San Felipe, Petorca, Putaendo, La Ligua, Los Andes | 14,000 | 116,914 |
| Valparaiso | Valparaiso, Quillota, Limache, Casablanca | 4,598 | 320,398 |
| Santiago | Santiago, La Victoria, Melipilla, San Antonio | 15,260 | 685,358 |
| O’Higgins | Rancagua, Cachapoal, Maipo | 5,617 | 118,591 |
| Colchagua | San Fernando, Caupolicán | 9,973 | 166,342 |
| Curicó | Curicó, Santa Cruz, Vichuquén | 7,885 | 108,148 |
| Talca | Talca, Lontué, Curepto | 10,006 | 133,957 |
| Maule | Cauquenes, Constitución, Chanco, Itatá | 7,281 | 113,231 |
| Linares | Linares, Loncomilla, Parral | 10,279 | 119,284 |
| Ñuble | Chillán, San Carlos, Bulnes, Yungay | 9,050 | 170,425 |
| Concepción | Concepción, Coelemu, Talcahuano, Puchacai, Lautaro, Rere | 8,579 | 247,611 |
| Arauco | Lebu, Arauco, Cañete | 5,668 | 60,233 |
| Bio-Bio | La Laja, Nascimiento, Mulchen | 13,863 | 107,072 |
| Malleco | Angol, Collipulli, Traiguen, Mariluán | 8,555 | 121,429 |
| Cautín | Temuco, Imperial, Llaima | 16,524 | 193,628 |
| Valdivia | Valdivia, Villarica, La Unión, Rio Bueno | 23,285 | 175,141 |
| Llanquihue | Llanquihue, Osorno, Carelmapu | 90,066 | 137,206 |
| Chiloé | Ancud, Quinchao, Castro | 18,074 | 110,331 |
| Territory of Magallanes | 169,251 | 28,960 |
| Total Chilean Territory | 750,572 | 3,754,723 |
