Municipality Tržič, which is part of the Gorenjska statistical region, measures 155 km2; this ranks it 36th among Slovene municipalities.
Statistical data for 2021 reveal the following:
In the middle of 2021 about 15,030 people (about 7,520 men and 7,510 women) were living in the municipality, which ranks Tržič 36th among Slovene municipalities. The population density was 97 people per square kilometre, which was lower than the national average of 104 people per square kilometre.
The number of live births was lower than the number of deaths, which means that natural increase per 1,000 population in the municipality was negative. It was -2.5 (in Slovenia -2.0). The number of people who moved from the municipality was higher than the number of people who moved into the municipality, so net migration per 1,000 population in the municipality was negative. It was -0.9. The sum of natural increase and net migration per 1,000 population in the municipality was negative. It was -3.4 (in Slovenia -0.9).
The mean age of people in Tržič was 44.9 years, which was lower than the national average (43.8).
As in most Slovene municipalities, in Tržič the number of old people was higher than the number of young people: there were 157 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 139. It also shows that the mean age of people in Tržič is growing more rapidly than in Slovenia as a whole. Data by sex show that the ageing index for women was in all municipalities except in five (Črna na Koroškem, Dobrovnik/Dobronak, Jezersko, Loški Potok in Mislinja) higher than the ageing index for men. In Tržič – as in most Slovene municipalities – more women were 65+ years old than 14 or less; for men the situation was the same.
Tržič had 3 kindergartens, which were attended by 552 children. Of all children in the municipality aged 1–5, 81% were included in kindergartens, which was the same as the national average. In the school year 2021/22 elementary schools in Tržič were attended by about 1,310 pupils, while various upper secondary schools were attended by about 480 pupils. There were 34 students and 6 graduates per 1,000 people in the municipality; in Slovenia the averages were 39 per 1,000 and 8 per 1,000, respectively.
Among people aged 15–64 (i.e. working age population) about 69% were persons in employment (i.e. persons in paid employment or self-employed persons), which is more than the national average (67%).
In Tržič, average monthly gross earnings per person employed by legal persons were about 14% lower than the annual average of monthly earnings for Slovenia; net earnings were about 13% lower.
Among 1,000 inhabitants in the municipality, 567 had a passenger car. The car was on average 11 years old.
In 2021, 283 kg of municipal waste per person was collected in Tržič, which is 82 kg less than on average in Slovenia.