Municipality Ig, which is part of the osrednjeslovenska statistical region, measures 99 km2; this ranks it 71th among Slovene municipalities.
Statistical data for 2015 reveal the following:
In the middle of 2015 about 7,150 people (about 3,550 men and 3,550 women) were living in the municipality, which ranks Ig 74th among Slovene municipalities. The population density was 72 people per square kilometre, which was lower 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 3.6 (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 0.4. The sum of natural increase and net migration per 1,000 population in the municipality was positive. It was 4.1 (in Slovenia 0.6).
The mean age of people in Ig was 40.5 years, which was lower than the national average (42.6).
in contrast to most Slovene municipalities, in Ig the number of young people was higher than the number of old people: there were 88 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 Ilirska Bistrica 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 Ig – in contrast to most Slovene municipalities – fewer women were 65+ years old than 14 or less; for men the situation was exactly the opposite.
In the school year 2015/2016 basic schools in Ig were attended by about 600 pupils, while various upper secondary schools were attended by about 250 pupils. There were 40 students and 8 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 62% 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 8.6%, which is less than the national average (12.3%). As in most Slovene municipalities, more women than men were unemployed.
In Ig, average monthly gross earnings per person employed by legal persons were about 11% lower than the annual average of monthly earnings for Slovenia; and net earnings about 4% lower.
In 2015, there were 368 dwellings per 1,000 population. About 68% of dwellings had at least three rooms. Average size of dwellings in the municipality was 91 m2.
Every other person in Ig had a car (54 passenger cars per 100 population); cars in this municipality were on average 10 years old.
In 2015, 251 kg of municipal waste per person was collected in Ig, which is 64 kg less than on average in Slovenia.