Municipality Mengeš, which is part of the Osrednjeslovenska statistical region, measures 22 km2; this ranks it 195th among Slovene municipalities.
Statistical data for 2010 reveal the following:
In the middle of 2010 about 7,400 people (about 3,550 men and 3,850 women) were living in the municipality, which ranks Mengeš 68th among Slovene municipalities. The population density was 328 people per square kilometre, which was higher than the national average of 101 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 1.9 (in Slovenia 1.8). 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 -5.3. The sum of natural increase and net migration per 1,000 population in the municipality was negative. It was -3.4 (in Slovenia 1.6).
The mean age of people in Mengeš was 40.5 years, which was lower than the national average (41.6).
As in most Slovene municipalities, in Mengeš the number of old people was higher than the number of young people: there were 102 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 117. It also shows that the mean age of people in Mengeš 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 Mengeš – as in most Slovene municipalities – more women were 65+ years old than 14 or less; for men the situation was exactly the opposite.
Mengeš had 3 kindergartens. They were attended by 298 children or 72% of all children aged 1–5, which was less than the national average of 74%. In the school year 2010/2011 elementary school in Mengeš was attended by about 580 pupils, while various upper secondary schools were attended by about 310 pupils. There were 56 students and 11 graduates per 1,000 people in the municipality; in Slovenia the averages were 52 per 1,000 and 10 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 of 59%.
The registered unemployment rate was 7.6%, which is less than the national average (10.7%). As in most Slovene municipalities, more women than men were unemployed.
In Mengeš, 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.
Every 28th person in the municipality was receiving at least one financial social assistance. In Slovenia as a whole every 22nd person received at least one financial social assistance.
The value of gross investment in new fixed assets in the municipality (EUR 2,920 per capita) was higher than the national average (EUR 2,176 per capita).
In 2010, there were 333 dwellings per 1,000 population. About 62% of dwellings had at least three rooms. Average size of dwellings in the municipality was 79 m2.
About every other person in Mengeš had a car (53 passenger cars per 100 population); cars in this municipality were on average 8 years old.
In 2010, 498 kg of municipal waste per person was collected in Mengeš, which is 109 kg more than on average in Slovenia.