Municipality Tolmin, which is part of the Goriška statistical region, measures 382 km2; this ranks it 3rd among Slovene municipalities.
Statistical data for 2011 reveal the following:
In the middle of 2011 about 11,600 people (about 5,800 men and 5,800 women) were living in the municipality, which ranks Tolmin 46th among Slovene municipalities. The population density was 30 people per square kilometre, which was lower than the national average of 101 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 -3.8 (in Slovenia 1.6). 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 1.9. The sum of natural increase and net migration per 1,000 population in the municipality was negative. It was -1.9 (in Slovenia 2.6).
The mean age of people in Tolmin was 44.3 years, which was higher than the national average (41.8).
As in most Slovene municipalities, in Tolmin the number of old people was higher than the number of young people: there were 153 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 117. It also shows that the mean age of people in Tolmin 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 Tolmin – as in most Slovene municipalities – more women were 65+ years old than 14 or less; for men the situation was the same.
Tolmin had 8 kindergartens. They were attended by 393 children or 73% of all children aged 1–5, which was less than the national average of 76%. In the school year 2011/2012 basic schools in Tolmin were attended by about 840 pupils, while various upper secondary schools were attended by about 430 pupils. There were 60 students and 12 graduates per 1,000 people in the municipality; in Slovenia the averages were 51 per 1,000 and 10 per 1,000, respectively.
Among people aged 15–64 (i.e. working age population) about 59% were persons in employment (i.e. persons in paid employment or self-employed persons), which is more than the national average of 58%.
The registered unemployment rate was 10.6%, which is less than the national average (11.8%). As in most Slovene municipalities, more women than men were unemployed.
In Tolmin, average monthly gross earnings per person employed by legal persons were about 12% lower than the annual average of monthly earnings for Slovenia; and net earnings about 9% lower.
Every 38th person in the municipality was receiving at least one financial social assistance. In Slovenia as a whole every 24th person received at least one financial social assistance.
In 2011, there were 462 dwellings per 1,000 population. About 74% of dwellings had at least three rooms. Average size of dwellings in the municipality was 83 m2.
About every other person in Tolmin had a car (54 passenger cars per 100 population); cars in this municipality were on average 10 years old.
In 2011, 315 kg of municipal waste per person was collected in Tolmin, which is 37 kg less than on average in Slovenia.