BackCsík County
Language
| District | Area (km2) |
Inhab. | Density | Hun. | Ger. | Slov. | Rom. | Russ. | Cro. | Serb. | Other | Notice |
| Felcsíki | 1276 | 33936 | 26.6 | 33737 | 48 | 3 | 15 | 1 | 4 | 1 | 127 | |
| Gyergyószentmiklósi | 1325 | 41333 | 31.2 | 34898 | 317 | 33 | 5838 | 120 | 4 | 123 | ||
| Gyergyótölgyesi | 564 | 15620 | 27.7 | 5457 | 345 | 1 | 9767 | 1 | 1 | 48 | ||
| Kászonalcsíki | 806 | 21849 | 27.1 | 21756 | 17 | 11 | 36 | 29 | ||||
| Szépvizi | 602 | 20376 | 33.8 | 17900 | 193 | 18 | 2177 | 13 | 2 | 73 | ||
| Csíkszereda cc. | 1 | 3701 | 3701 | 3591 | 45 | 7 | 44 | 2 | 3 | 1 | 8 | |
| Gyergyószentmiklós cc. | 491 | 8905 | 18.1 | 8549 | 115 | 12 | 155 | 51 | 23 | |||
| 5065 | 145720 | 125888 | 1080 | 85 | 18032 | 188 | 13 | 3 | 431 |
Religion
| District | Area (km2) |
Inhab. | Density | Rc. | Gc. | Calv. | Luth. | Go. | Unit. | Jew. |
| Felcsíki | 1276 | 33936 | 26.6 | 32610 | 964 | 225 | 27 | 6 | 13 | 91 |
| Gyergyószentmiklósi | 1325 | 41333 | 31.2 | 33409 | 7029 | 282 | 34 | 49 | 20 | 509 |
| Gyergyótölgyesi | 564 | 15620 | 27.7 | 4914 | 9778 | 128 | 16 | 25 | 17 | 737 |
| Kászonalcsíki | 806 | 21849 | 27.1 | 19654 | 1825 | 251 | 18 | 39 | 24 | 36 |
| Szépvizi | 602 | 20376 | 33.8 | 15951 | 3595 | 282 | 55 | 39 | 32 | 422 |
| Csíkszereda cc. | 1 | 3701 | 3701 | 2924 | 95 | 328 | 65 | 21 | 27 | 241 |
| Gyergyószentmiklós cc. | 491 | 8905 | 18.1 | 7889 | 438 | 193 | 48 | 9 | 7 | 321 |
| 5065 | 145720 | 117351 | 23724 | 1689 | 263 | 188 | 140 | 2357 |
| Abbreviations: | ||||||
| Hun. Hungarian | Rc. Roman Catholic | Inhab. Inhabitants | ||||
| Ger. German | Gc. Greek Catholic | |||||
| Slov. Slovakian | Calv. Calvinist | cc. City with Council | ||||
| Rom. Romanian | Luth. Lutheran | cmr. City with Municipal Right | ||||
| Russ. Russniak | Go. Greek Orthodox | pv. Political Village (in Croatian-Slavonia) | ||||
| Cro. Croatian | Unit. Unitarian | v. Village (in Croatian-Slavonia) | ||||
| Serb. Serbian | Jew. Jewish | |||||