Population in Sliven 18 indicators covering population for Sliven. IndicatorLatest Year10-yr change Rank Demographic balances and indicators by type of projection and NUTS 3 0.6228 % change on previous year 2100 up 227.4% 33rd Heat stress - Cities and FUAs — Mean population exposure to heat 53.4 Days per year 2025 up 42.7% 532nd Population on 1st January by age, sex, type of projection and NUTS 3 143,707 Person 2100 up 1.5% 804th Assumptions for net migration by age, sex, type of projection and 165 Person 2100 up 170.5% 1042nd Assumptions for fertility rates by age, type of projection and NUTS 3 1.89 Number 2100 down 2.3% 19th Population by age and sex - Cities and FUAs 110,470 Persons 2025 down 9.7% 926th Population and built-up density - Cities and FUAs — Urbanised area 17 Square kilometres 2030 up 6.2% 593rd Live births (total) by NUTS 3 region 2,117 Number 2024 down 11.6% 1169th Population density by NUTS 3 region 48.2 Persons per square kilometre 2024 down 13.3% 1580th Population on 1 January by broad age group, sex and NUTS 3 region 169,299 Number 2025 down 10.1% 1497th Population change - Demographic balance and crude rates at regional -279 2024 up 85.9% 1698th Population structure indicators by type of projection and NUTS3 region 76.8 2100 up 0.1% 1058th Population on 1st January by age group, sex, type of projection and 123,208 Person 2100 up 1.0% 803rd Projected life expectancy at birth, by sex, type of projection and 85.1 Year 2095 up 2.5% 1143rd Demographic balances by type of projection and NUTS3 region 6,058 2095 down 4.7% 935th Assumptions for total fertility rates, type of projection and NUTS 3 2.07 Number 2095 down 3.9% 1st Population on 1 January by age group, sex and NUTS 3 region 169,299 Number 2025 down 10.1% 1495th Live births by age group of the mothers and NUTS 3 region 2,117 Number 2024 down 11.6% 1169th