42°41′N 26°21′E / 42.683°N 26.350°E
Sliven Province
Област Сливен | |
|---|---|
A rural landscape in Sliven Province | |
Location of Sliven Province in Bulgaria | |
| Country | Bulgaria |
| Capital | Sliven |
| Municipalities | 4 |
| Government | |
| • Governor | Chavdar Bozhourski |
| Area | |
• Total | 3,544.1 km2 (1,368.4 sq mi) |
| Population (December 2022) | |
• Total | 170,583 |
| • Density | 48.132/km2 (124.66/sq mi) |
| Time zone | UTC+2 (EET) |
| • Summer (DST) | UTC+3 (EEST) |
| License plate | CH |
| Website | regionsliven |
Sliven Province (Bulgarian: Област Сливен, former name Sliven okrug) is a province in southeastern Bulgaria, named after its administrative and industrial centre Sliven. It has a territory of 3,544.1 km2 (1,368.4 sq mi) that is divided into four municipalities, with a total population, as of December 2009, of 204,887.

The Sliven province contains four municipalities. The following table shows the names of each municipality in English and Cyrillic, the main town or village (towns are shown in bold), and the population of each as of December 2009.
| Municipality | Cyrillic | Pop. | Town/Village | Pop. |
|---|---|---|---|---|
| Kotel | Котел | 20,338 | Kotel | 6,232 |
| Nova Zagora | Нова Загора | 41,959 | Nova Zagora | 23,625 |
| Sliven | Сливен | 128,249 | Sliven | 93,781 |
| Tvarditsa | Твърдица | 14,341 | Tvarditsa | 5,669 |
Sliven is situated in the Sliven Valley at the foothills of the unique rock massif "Sinite Kamani" (The Blue Rocks) in the Balkan Mountains, very close to mineral springs. The town is famous for its clean fresh air, clean water sources, mild winters and cool summers.
Sliven is thought to be one of the oldest settlements in Europe. Thracians, Romans, Slavs, and Ancient Greeks have all lived in the region. The first Roman settlement on this place, Tuida (3rd century BC), was a famous trade centre. Sliven was mentioned as a big town for the first time in 1153 by the Arab traveler Muhammad al-Idrisi.
| Year | Pop. | ±% |
|---|---|---|
| 1946 | 175,053 | — |
| 1956 | 193,309 | +10.4% |
| 1965 | 219,702 | +13.7% |
| 1975 | 232,986 | +6.0% |
| 1985 | 239,448 | +2.8% |
| 1992 | 234,785 | −1.9% |
| 2001 | 218,474 | −6.9% |
| 2011 | 197,473 | −9.6% |
| 2021 | 172,690 | −12.6% |
| Source: pop-stat.mashke.org | ||
As of the end of 2009, the population of the province, announced by the Bulgarian National Statistical Institute, numbered 204,887 of which 22.3% are inhabitants over 60 years old.
Total population (2011 census): 197 473
Ethnic groups (2011 census):
Identified themselves: 173 206 persons:
A further 24,000 persons in Sliven Province did not declare their ethnic group at the 2011 census.
According to the 2001 census, the province had a population of 218 474 inhabitants, of whom 163 188 were Bulgarians, 26 777 Romani, 22 971 Turks, etc.
Religious adherence in the province according to 2001 census:
| Census 2001 | ||
|---|---|---|
| religious adherence | population | % |
| Orthodox Christians | 178,721 | 81.80% |
| Muslims | 21,668 | 9.92% |
| Protestants | 5,071 | 2.33% |
| Roman Catholics | 251 | 0.11% |
| Other | 1,057 | 0.48% |
| Religion not mentioned | 11,706 | 5.36% |
| total | 218,474 | 100% |

The Sinite Kamani Nature Park is known for its nature landmarks. Halkata, the arc-shaped rock garland, is one of the symbols of the town of Sliven.
The vertebrate animals are represented by 235 species: eight species of fish, nine species of amphibians, nineteen species of reptiles, 165 species of birds and 34 species of mammals.
The lay is of typical mountain type, with steep and ravine slopes between 290 and 1181 metres above sea level. IThrough the park flow many rivers and their beds form numerous shoots, pools and waterfalls.