Provinces & states
First-level administrative divisions, their capitals, population and area.
| Province / state | Country | Capital | Population | Area |
|---|---|---|---|---|
| Bucuresti | Romania | Bucharest | 2,319,000 | 1,521 |
| Budapest (munic.) | Hungary | Budapest | 2,008,500 | 525 |
| Buenos Aires | Argentina | La Plata | 12,594,974 | 307,571 |
| Bukhoro | Uzbekistan | Bukhoro | 1,262,000 | 39,400 |
| Bulgaria | Bulgaria | Sofia | 8,612,757 | 110,910 |
| Bur Said (munic.) | Egypt | Bur Said | 461,000 | 72 |
| Burdur | Turkey | Burdur | 254,899 | 6,887 |
| Burgenland | Austria | Eisenstadt | 273,000 | 3,965 |
| Burkina Faso | Burkina Faso | Ouagadougou | 10,623,323 | 274,200 |
| Bursa | Turkey | Bursa | 1,603,137 | 11,043 |
| Burundi | Burundi | Bujumbura | 5,943,057 | 27,830 |
| Bushehr | Iran | Bushehr | 694,252 | 27,653 |
| Buskerud | Norway | Drammen | 219,967 | — |
| Buzau | Romania | Buzau | 524,000 | 6,072 |
| Bydgoskie | Poland | Bydgoszcz | 1,120,300 | 10,349 |
| Cabinda | Angola | Cabinda | 163,000 | 7,270 |
| Cabo Delgado | Mozambique | Pemba | 1,202,200 | 82,625 |
| Caerphilly | United Kingdom | Ystrad Fawr | 171,000 | 279 |
| Cajamarca | Peru | Cajamarca | 1,349,129 | 33,247 |
| Calabria | Italy | Catanzaro | 2,080,000 | 15,080 |
| Calarasi | Romania | Calarasi | 351,000 | 5,075 |
| Caldas | Colombia | Manizales | 883,024 | 7,888 |
| California | United States | Sacramento | 32,268,301 | 411,047 |
| Callao | Peru | Callao | 701,022 | 146 |
| Camaguey | Cuba | Camaguey | 723,000 | 15,990 |
| Cambodia | Cambodia | Phnom Penh | 10,861,218 | 181,040 |
| Cambridgeshire | United Kingdom | Cambridge | 669,900 | 3,409 |
| Campania | Italy | Napoli | 5,709,000 | 13,595 |
| Campeche | Mexico | Campeche | 642,516 | 51,833 |
| Canakkale | Turkey | Canakkale | 432,263 | 9,737 |
| Canary Islands | Spain | Santa Cruz de Tenerife | 1,534,897 | 7,447 |
| Cankiri | Turkey | Cankiri | 279,129 | 8,454 |
| Cantabria | Spain | Santander | 526,090 | 5,321 |
| Cape Verde | Cape Verde | Praia | 449,066 | 4,030 |
| Caqueta | Colombia | Florencia | 264,507 | 88,965 |
| Carabobo | Venezuela | Valencia | 1,823,767 | 4,650 |
| Caras Severin | Romania | Resita | 408,000 | 8,503 |
| Cardiff | United Kingdom | Cardiff | 306,600 | 139 |
| Carinthia | Austria | Klagenfurt | 559,000 | 9,533 |
| Carmarthenshire | United Kingdom | Carmarthen | 169,000 | 2,398 |
| Cartago | Costa Rica | Cartago | 359,765 | 3,125 |
| Casanare | Colombia | Yopal | 147,472 | 44,640 |
| Castelo Branco | Portugal | — | 214,700 | 6,675 |
| Castile and Leon | Spain | Valladolid | 2,504,371 | 94,224 |
| Castile La Mancha | Spain | Toledo | 1,656,179 | 79,462 |
| Catalonia | Spain | Barcelona | 6,090,107 | 32,113 |
| Catamarca | Argentina | San Fernando del Valle de Catamarca | 264,324 | 102,602 |
| Cauca | Colombia | Popayan | 857,751 | 29,308 |