Municipality Šmarje pri Jelšah, which is part of the Savinjska statistical region, measures 108 km2; this ranks it 62nd among Slovene municipalities.
Statistical data for 2013 reveal the following:
In the middle of 2013 about 10,300 people (about 5,050 men and 5,200 women) were living in the municipality, which ranks Šmarje pri Jelšah 53rd among Slovene municipalities. The population density was 95 people per square kilometre, which was lower than the national average of 102 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 -3.2 (in Slovenia 0.9). 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. The sum of natural increase and net migration per 1,000 population in the municipality was negative. It was -6.2 (in Slovenia 1.1).
The mean age of people in Šmarje pri Jelšah was 41.0 years, which was lower than the national average (42.2).
In contrast to most Slovene municipalities, in Šmarje pri Jelšah the number of young people was higher than the number of old people: there were 99 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 119. It also shows that the mean age of people in Šmarje pri Jelšah 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 Šmarje pri Jelšah – as in most Slovene municipalities – more women were 65+ years old than 14 or less; for men the situation was exactly the opposite.
Šmarje pri Jelšah had 8 kindergarten. They were attended by 487 children or 80% of all children aged 1–5, which was more than the national average of 75%. In the school year 2013/2014 basic schools in Šmarje pri Jelšah were attended by about 920 pupils, while various upper secondary schools were attended by about 410 pupils. There were 50 students and 8 graduates per 1,000 people in the municipality; in Slovenia the averages were 44 per 1,000 and 9 per 1,000, respectively.
Among people aged 15–64 (i.e. working age population) about 60% 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 13.6%, which is more than the national average (13.1%). As in most Slovene municipalities, more women than men were unemployed.
In Šmarje pri Jelšah, 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.
In 2013, there were 418 dwellings per 1,000 population. About 64% of dwellings had at least three rooms. Average size of dwellings in the municipality was 81 m2.
About every other person in Šmarje pri Jelšah had a car (52 passenger cars per 100 population); cars in this municipality were on average 10 years old.
In 2013, 171 kg of municipal waste per person was collected in Šmarje pri Jelšah, which is 149 kg less than on average in Slovenia.