Municipality Šmarje pri Jelšah, which is part of the Savinjska statistical region, measures 108 km2; this ranks it 62th among Slovene municipalities.
Statistical data for 2016 reveal the following:
In the middle of 2016 about 10,260 people (about 5,090 men and 5,170 women) were living in the municipality, which ranks Šmarje pri Jelšah 54th among Slovene municipalities. The population density was 95 people per square kilometre, which was lower than the national average 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 -1.2 (in Slovenia 0.3). 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 0.6. The sum of natural increase and net migration per 1,000 population in the municipality was negative. It was -0.6 (in Slovenia 0.8).
The mean age of people in Šmarje pri Jelšah was 41.9 years, which was lower than the national average (42.9).
As in most Slovene municipalities, in Šmarje pri Jelšah the number of old people was higher than the number of young people: there were 105 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 125. 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 – in contrast to 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 2016/2017 basic schools in Šmarje pri Jelšah were attended by about 960 pupils, while various upper secondary schools were attended by about 410 pupils. There were 39 students and 14 graduates per 1,000 people in the municipality; in Slovenia the averages were 39 per 1,000 and 15 per 1,000, respectively.
Among people aged 15–64 (i.e. working age population) about 61% were persons in employment (i.e. persons in paid employment or self-employed persons), which is more than national average (60%).
The registered unemployment rate was 12.2%, which is more than the national average (11.2%). 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 14% lower than the annual average of monthly earnings for Slovenia; and net earnings about 12% lower.
In 2015, there were 407 dwellings per 1,000 population. About 64% of dwellings had at least three rooms. Average size of dwellings in the municipality was 81 m2.
Every other person in Šmarje pri Jelšah had a car (55 passenger cars per 100 population); cars in this municipality were on average 11 years old.
In 2016, 251 kg of municipal waste per person was collected in Šmarje pri Jelšah, which is 96 kg less than on average in Slovenia.