Municipality Izola, which is part of the Obalno-kraška statistical region, measures 29 km2; this ranks it 182nd among Slovene municipalities.

Statistical data for 2010 reveal the following:

In the middle of 2010 about 15,850 people (about 8,000 men and 7,850 women) were living in the municipality, which ranks Izola 30th among Slovene municipalities. The population density was 555 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 4.3 (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 -13.9. The sum of natural increase and net migration per 1,000 population in the municipality was negative. It was -9.6 (in Slovenia 1.6).

The mean age of people in Izola was 42.7 years, which was higher than the national average (41.6).

As in most Slovene municipalities, in Izola the number of old people was higher than the number of young people: there were 131 people, aged 65 or more, per 100 people aged 0–14. This ratio shows that the value of the ageing index was higher than the national average of 117. It also shows that the mean age of people in Izola is growing more rapidly 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 Izola – as in most Slovene municipalities – more women were 65+ years old than 14 or less; for men the situation was exactly the opposite.

Izola had 4 kindergartens. They were attended by 584 children or 79% of all children aged 1–5, which was more than the national average of 74%. In the school year 2010/2011 elementary schools in Izola were attended by about 980 pupils, while various upper secondary schools were attended by about 520 pupils. There were 43 students and 7 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 60% 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 9.3%, which is less than the national average (10.7%). As in most Slovene municipalities, more women than men were unemployed.

In Izola, average monthly gross earnings per person employed by legal persons were about 6% lower than the annual average of monthly earnings for Slovenia; and net earnings about 5% lower.

Every 26th 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 1,541 per capita) was lower than the national average (EUR 2,176 per capita).

In 2010, there were 438 dwellings per 1,000 population. About 58% of dwellings had at least three rooms. Average size of dwellings in the municipality was 74 m2.

About every other person in Izola had a car (54 passenger cars per 100 population); cars in this municipality were on average 8 years old.

In tourist accommodations in the municipality around 86,000 arrivals and 349,600 overnight stays of tourist were recorded, which is approximately 2.9 % of all arrivals and 3.9 % of all overnight stays of tourist in Slovenia. 

In 2010, 540 kg of municipal waste per person was collected in Izola, which is 151 kg more than on average in Slovenia.