Municipality Železniki, which is part of the Gorenjska statistical region, measures 164 km2; this ranks it 34th among Slovene municipalities.
Statistical data for 2011 reveal the following:
In the middle of 2011 about 6,750 people (about 3,450 men and 3,300 women) were living in the municipality, which ranks Železniki 77th among Slovene municipalities. The population density was 41 people per square kilometre, which was lower 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 3.4 (in Slovenia 1.6). 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 -0.4. The sum of natural increase and net migration per 1,000 population in the municipality was positive. It was 2.9 (in Slovenia 2.6).
The mean age of people in Železniki was 39.1 years, which was lower than the national average (41.8).
In contrast to most Slovene municipalities, in Železniki the number of young people was higher than the number of old people: there were 86 people, aged 65 or more, per 100 people aged 0–14. This ratio shows that the value of the ageing index was lower than the national average of 117. It also shows that the mean age of people in Železniki is growing more slowly 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 Železniki – as in most Slovene municipalities – more women were 65+ years old than 14 or less; for men the situation was exactly the opposite.
Železniki had 3 kindergartens. They were attended by 266 children or 67% of all children aged 1–5, which was less than the national average of 76%. In the school year 2011/2012 basic schools in Železniki were attended by about 690 pupils, while various upper secondary schools were attended by about 340 pupils. There were 70 students and 14 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 65% 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 5.8%, which is less than the national average (11.8%). As in most Slovene municipalities, more women than men were unemployed.
In Železniki, average monthly gross earnings per person employed by legal persons were about 17% lower than the annual average of monthly earnings for Slovenia; and net earnings about 15% lower.
Every 86th 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 332 dwellings per 1,000 population. About 75% of dwellings had at least three rooms. Average size of dwellings in the municipality was 101 m2.
About every other person in Železniki had a car (52 passenger cars per 100 population); cars in this municipality were on average 9 years old.
In 2011, 208 kg of municipal waste per person was collected in Železniki, which is 144 kg less than on average in Slovenia.