Municipality Šmartno ob Paki, which is part of the savinjska statistical region, measures 18 km2; this ranks it 204th among Slovene municipalities.
Statistical data for 2015 reveal the following:
In the middle of 2015 about 3,200 people (about 1,600 men and 1,600 women) were living in the municipality, which ranks Šmartno ob Paki 149th among Slovene municipalities. The population density was 177 people per square kilometre, which was higher than the national average of 102 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 1.6 (in Slovenia 0.4). 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 2.5. The sum of natural increase and net migration per 1,000 population in the municipality was positive. It was 4.0 (in Slovenia 0.6).
The mean age of people in Šmartno ob Paki was 41.7 years, which was lower than the national average (42.6).
As in most Slovene municipalities, in Šmartno ob Paki the number of old people was higher than the number of young people: there were 101 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 123. It also shows that the mean age of people in Šoštanj 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 Šmartno ob Paki – as in most Slovene municipalities – more women were 65+ years old than 14 or less; for men the situation was the same.
In the school year 2015/2016 basic school in Šmartno ob Paki was attended by about 300 pupils, while various upper secondary schools were attended by about 150 pupils. There were 50 students and 13 graduates per 1,000 people in the municipality; in Slovenia the averages were 39 per 1,000 and 9 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 the national average (58%).
The registered unemployment rate was 9.9%, which is less than the national average (12.3%). As in most Slovene municipalities, more women than men were unemployed.
In Šmartno ob Paki, average monthly gross earnings per person employed by legal persons were about 22% lower than the annual average of monthly earnings for Slovenia; and net earnings about 6% higher.
In 2015, there were 372 dwellings per 1,000 population. About 71% of dwellings had at least three rooms. Average size of dwellings in the municipality was 92 m2.
Every other person in Šmartno ob Paki had a car (54 passenger cars per 100 population); cars in this municipality were on average 10.4 years old.
In 2015, 239 kg of municipal waste per person was collected in Šmartno ob Paki, which is 76 kg less than on average in Slovenia.