Municipality Ptuj, which is part of the Podravska statistical region, measures 67 km2; this ranks it 104th among Slovene municipalities.

Statistical data for 2012 reveal the following:

In the middle of 2012 about 23,550 people (about 11,450 men and 12,100 women) were living in the municipality, which ranks Ptuj 14th among Slovene municipalities. The population density was 353 people per square kilometre, which was higher than the national average of 101 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 -1.6 (in Slovenia 1.3). 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 -6.8. The sum of natural increase and net migration per 1,000 population in the municipality was negative. It was -8.4 (in Slovenia 1.6).

The mean age of people in Ptuj was 43.1 years, which was higher than the national average (42).

As in most Slovene municipalities, in Ptuj the number of old people was higher than the number of young people: there were 138 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 118. It also shows that the mean age of people in Ptuj 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 Ptuj – as in most Slovene municipalities – more women were 65+ years old than 14 or less; for men the situation was the same.

Ptuj had 10 kindergartens. They were attended by 957 children or 78% of all children aged 1–5, which was more than the national average of 75%. In the school year 2012/2013 basic schools in Ptuj were attended by about 1,680 pupils, while various upper secondary schools were attended by about 980 pupils. There were 50 students and 11 graduates per 1,000 people in the municipality; in Slovenia the averages were 47 per 1,000 and 10 per 1,000, respectively.

Among people aged 15–64 (i.e. working age population) about 55% were persons in employment (i.e. persons in paid employment or self-employed persons), which is less than the national average of 57%.

The registered unemployment rate was 12.9%, which is more than the national average (12%). As in most Slovene municipalities, more women than men were unemployed.

In Ptuj, average monthly gross earnings per person employed by legal persons were about 16% lower than the annual average of monthly earnings for Slovenia; and net earnings about 14% lower.

In 2012, there were 417 dwellings per 1,000 population. About 61% of dwellings had at least three rooms. Average size of dwellings in the municipality was 79 m2.

About every other person in Ptuj had a car (52 passenger cars per 100 population); cars in this municipality were on average 9 years old.

In 2012, 466 kg of municipal waste per person was collected in Ptuj, which is 139 kg more than on average in Slovenia.