Municipality Zreče, which is part of the savinjska statistical region, measures 67 km2; this ranks it 104th among Slovene municipalities.
Statistical data for 2015 reveal the following:
In the middle of 2015 about 6,400 people (about 3,250 men and 3,150 women) were living in the municipality, which ranks Zreče 81th among Slovene municipalities. The population density was 96 people per square kilometre, which was lower than the national average of 102 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 3.3 (in Slovenia 0.4). 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 –0.8. The sum of natural increase and net migration per 1,000 population in the municipality was positive. It was 2.5 (in Slovenia 0.6).
The mean age of people in Zreče was 41.1 years, which was lower than the national average (42.6).
in contrast to most Slovene municipalities, in Zreče the number of young people was higher than the number of old people: there were 98 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 123. 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 Zreče – as in most Slovene municipalities – more women were 65+ years old than 14 or less; for men the situation was exactly the opposite.
In the school year 2015/2016 basic schools in Zreče were attended by about 550 pupils, while various upper secondary schools were attended by about 300 pupils. There were 40 students and 10 graduates per 1,000 people in the municipality; in Slovenia the averages were 39 per 1,000 and 9 per 1,000, respectively.
Among people aged 15–64 (i.e. working age population) about 64% were persons in employment (i.e. persons in paid employment or self–employed persons), which is more than the national average (58%).
The registered unemployment rate was 10.4%, which is less than the national average (12.3%). As in most Slovene municipalities, more women than men were unemployed.
In Zreče, average monthly gross earnings per person employed by legal persons were about 8% lower than the annual average of monthly earnings for Slovenia; and net earnings about 15% lower.
In 2015, there were 409 dwellings per 1,000 population. About 62% of dwellings had at least three rooms. Average size of dwellings in the municipality was 79 m2.
Every other person in Zreče had a car (53 passenger cars per 100 population); cars in this municipality were on average 9.7 years old.
In 2015, 254 kg of municipal waste per person was collected in Zreče, which is 61 kg less than on average in Slovenia.