Municipality Slovenj Gradec, which is part of the Koroška statistical region, measures 174 km2; this ranks it 29th among Slovene municipalities.
Statistical data for 2012 reveal the following:
In the middle of 2012 about 16,850 people (about 8,400 men and 8,450 women) were living in the municipality, which ranks Slovenj Gradec 27th among Slovene municipalities. The population density was 97 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 1.3). 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 -3.1. The sum of natural increase and net migration per 1,000 population in the municipality was positive. It was 0.3 (in Slovenia 1.6).
The mean age of people in Slovenj Gradec was 41.0 years, which was lower than the national average (42).
In contrast to most Slovene municipalities, in Slovenj Gradec 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 118. It also shows that the mean age of people in Slovenj Gradec 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 Slovenj Gradec – as in most Slovene municipalities – more women were 65+ years old than 14 or less; for men the situation was exactly the opposite.
Slovenj Gradec had 7 kindergartens. They were attended by 631 children or 71% of all children aged 1–5, which was less than the national average of 75%. In the school year 2012/2013 basic schools in Slovenj Gradec were attended by about 1,430 pupils, while various upper secondary schools were attended by about 770 pupils. There were 50 students and 13 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 58% were persons in employment (i.e. persons in paid employment or self-employed persons), which is more than the national average of 57%.
The registered unemployment rate was 12.2%, which is more than the national average (12%). As in most Slovene municipalities, more women than men were unemployed.
In Slovenj Gradec, average monthly gross earnings per person employed by legal persons were about 6% lower than the annual average of monthly earnings for Slovenia; and net earnings about 6% lower.
In 2012, there were 357 dwellings per 1,000 population. About 67% of dwellings had at least three rooms. Average size of dwellings in the municipality was 92 m2.
About every other person in Slovenj Gradec had a car (51 passenger cars per 100 population); cars in this municipality were on average 9 years old.
In 2012, 220 kg of municipal waste per person was collected in Slovenj Gradec, which is 107 kg less than on average in Slovenia.