Municipality Šmartno pri Litiji, which is part of the Osrednjeslovenska statistical region, measures 95 km2; this ranks it 76th among Slovene municipalities.
Statistical data for 2020 reveal the following:
In the middle of 2020 about 5,670 people (about 2,880 men and 2,800 women) were living in the municipality, which ranks Šmartno pri Litiji 93rd among Slovene municipalities. The population density was 60 people per square kilometre, which was lower than the national average of 104 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 -6.9 (in Slovenia -2.5). 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 11.1. The sum of natural increase and net migration per 1,000 population in the municipality was positive. It was 4.2 (in Slovenia 6.2).
The mean age of people in Šmartno pri Litiji was 42.6 years, which was lower than the national average (43.6).
As in most Slovene municipalities, in Šmartno pri Litiji the number of old people was higher than the number of young people: there were 119 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 136. It also shows that the mean age of people in Šmartno pri Litiji 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 three (Dobrovnik/Dobronak, Jezersko in Loški Potok) higher than the ageing index for men. In Šmartno pri Litiji – as in most Slovene municipalities – more women were 65+ years old than 14 or less; for men the situation was exactly the opposite.
Šmartno pri Litiji had 11 kindergartens, which were attended by 252 children. Of all children in the municipality aged 1–5, 82% were included in kindergartens, which was more than national average of 81%. In the school year 2020/21 elementary schools in Šmartno pri Litiji were attended by about 560 pupils, while various upper secondary schools were attended by about 200 pupils. There were 45 students and 8 graduates per 1,000 people in the municipality; in Slovenia the averages were 39 per 1,000 and 7 per 1,000, respectively.
Among people aged 15–64 (i.e. working age population) about 69% were persons in employment (i.e. persons in paid employment or self-employed persons), which is more than the national average (66%).
In Šmartno pri Litiji, average monthly gross earnings per person employed by legal persons were about 22% lower than the annual average of monthly earnings for Slovenia; net earnings were about 19% lower.
Among 1,000 inhabitants in the municipality, 566 had a passenger car. The car was on average 11 years old.
In 2020, 230 kg of municipal waste per person was collected in Šmartno pri Litiji, which is 125 kg less than on average in Slovenia.