Municipality Ljubljana, which is part of the Osrednjeslovenska statistical region, measures 275 km2; this ranks it 11th among Slovene municipalities.
Statistical data for 2012 reveal the following:
In the middle of 2012 about 280,300 people (about 134,750 men and 145,550 women) were living in the municipality, which ranks Ljubljana 1th among Slovene municipalities. The population density was 1,019 people per square kilometre, which was higher than the national average of 101 people per square kilometre.
The number of live births was higher than the number of deaths, which means that natural increase per 1,000 population in the municipality was positive. It was 2.9 (in Slovenia 1.3). The number of people who moved from the municipality was lower than the number of people who moved into the municipality, so net migration per 1,000 population in the municipality was positive. It was 5.6. The sum of natural increase and net migration per 1,000 population in the municipality was positive. It was 8.5 (in Slovenia 1.6).
The mean age of people in Ljubljana was 42.1 years, which was higher than the national average (42).
As in most Slovene municipalities, in Ljubljana the number of old people was higher than the number of young people: there were 128 people, aged 65 or more, per 100 people aged 0–14. This ratio shows that the value of the ageing index was higher than the national average of 118. It also shows that the mean age of people in Ljubljana is growing more rapidly than in Slovenia as a whole. Data by sex show that the ageing index for women was in all Slovene municipalities higher than the ageing index for men. In Ljubljana – as in most Slovene municipalities – more women were 65+ years old than 14 or less; for men the situation was exactly the opposite.
Ljubljana had 120 kindergartens. They were attended by 13,330 children or 83% of all children aged 1–5, which was more than the national average of 75%. In the school year 2012/2013 basic schools in Ljubljana were attended by about 20,540 pupils, while various upper secondary schools were attended by about 9,210 pupils. There were 50 students and 10 graduates per 1,000 people in the municipality; in Slovenia the averages were 47 per 1,000 and 10 per 1,000, respectively.
Among people aged 15–64 (i.e. working age population) about 57% were persons in employment (i.e. persons in paid employment or self-employed persons), which is the same as the national average.
The registered unemployment rate was 11.3%, which is less than the national average (12%). In contrast to most Slovene municipalities, more men than women were unemployed.
In Ljubljana, average monthly gross earnings per person employed by legal persons were about 17% higher than the annual average of monthly earnings for Slovenia; and net earnings about 14% higher.
In 2012, there were 445 dwellings per 1,000 population. About 50% of dwellings had at least three rooms. Average size of dwellings in the municipality was 69 m2.
Every other person in Ljubljana had a car (51 passenger cars per 100 population); cars in this municipality were on average 8 years old.
In 2012, 413 kg of municipal waste per person was collected in Ljubljana, which is 86 kg more than on average in Slovenia.