Municipality Grosuplje, which is part of the Osrednjeslovenska statistical region, measures 134 km2; this ranks it 48th among Slovene municipalities.
Statistical data for 2021 reveal the following:
In the middle of 2021 about 21,280 people (about 10,980 men and 10,300 women) were living in the municipality, which ranks Grosuplje 18th among Slovene municipalities. The population density was 159 people per square kilometre, which was higher than the national average of 104 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 0.4 (in Slovenia -2.0). 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 -2.4. The sum of natural increase and net migration per 1,000 population in the municipality was negative. It was -2.1 (in Slovenia -0.9).
The mean age of people in Grosuplje was 40.9 years, which was lower than the national average (43.8).
In contrast to most Slovene municipalities, in Grosuplje the number of young people was higher than the number of old people: there were 95 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 139. It also shows that the mean age of people in Grosuplje is growing more slowly than in Slovenia as a whole. Data by sex show that the ageing index for women was in all municipalities except in five (Črna na Koroškem, Dobrovnik/Dobronak, Jezersko, Loški Potok in Mislinja) higher than the ageing index for men. In Grosuplje – as in most Slovene municipalities – more women were 65+ years old than 14 or less; for men the situation was exactly the opposite.
Grosuplje had 17 kindergartens, which were attended by 963 children. Of all children in the municipality aged 1–5, 81% were included in kindergartens, which was the same as the national average. In the school year 2021/22 elementary schools in Grosuplje were attended by about 2,320 pupils, while various upper secondary schools were attended by about 900 pupils. There were 41 students and 8 graduates per 1,000 people in the municipality; in Slovenia the averages were 39 per 1,000 and 8 per 1,000, respectively.
Among people aged 15–64 (i.e. working age population) about 70% were persons in employment (i.e. persons in paid employment or self-employed persons), which is more than the national average (67%).
In Grosuplje, average monthly gross earnings per person employed by legal persons were about 11% lower than the annual average of monthly earnings for Slovenia; net earnings were about 10% lower.
Among 1,000 inhabitants in the municipality, 549 had a passenger car. The car was on average 10 years old.
In 2021, 348 kg of municipal waste per person was collected in Grosuplje, which is 17 kg less than on average in Slovenia.