Population in Siena 13 indicators covering population for Siena. IndicatorLatest Year10-yr change Rank Assumptions for fertility rates by age, type of projection and NUTS 3 1.6 Number 2100 up 2.9% 1068th Demographic balances and indicators by type of projection and NUTS 3 r 3,103 2100 up 0.4% 500th Live births (total) by NUTS 3 region 1,548 Number 2024 down 28.1% 1358th Population density by NUTS 3 region 68.3 Persons per square kilometre 2024 down 4.5% 1387th Population on 1 January by broad age group, sex and NUTS 3 region 259,460 Number 2025 down 3.9% 1216th Population change - Demographic balance and crude rates at regional le 1,187 2024 up 524.7% 985th Population on 1st January by age group, sex, type of projection and NU 212,203 Person 2100 down 2.8% 547th Population structure indicators by type of projection and NUTS3 region 89.6 2100 down 2.3% 357th Assumptions for total fertility rates, type of projection and NUTS 3 r 1.41 Number 2095 up 3.1% 1051st Projected life expectancy at birth, by sex, type of projection and NUT 89.3 Year 2095 up 1.1% 83rd Demographic balances by type of projection and NUTS3 region 15,361 2095 up 0.2% 512th Population on 1 January by age group, sex and NUTS 3 region 259,460 Number 2025 down 3.9% 1215th Live births by age group of the mothers and NUTS 3 region 1,548 Number 2024 down 28.1% 1358th