Location map: Ostrov (Constanța County)
Locality · Constanța County

Ostrov (Constanța County): population and statistics

Ostrov has a population of 4,566 (2026) across 177.1 km², or 25.8 people per km². It ranks 878 of 3,181 localities by population. Its population is falling: −9.3% between 2016 and 2026.

  • 4,566 residents
  • 177.1 km²
  • 26 people/km²

Key points

Among the 70 localities in Constanța County, Ostrov ranks No. 30 by population.

Building permits for residential buildings per 1,000 inhabitants: 0.22 ‰ in Ostrov, compared with an average of 2.01 ‰ in Constanța County and 1.87 ‰ nationally.

Drinking water distributed per inhabitant (m³): 70.3 m³ in Ostrov, compared with an average of 54.9 m³ in Constanța County and 39.9 m³ nationally.

Ostrov: the most common activity among active businesses is Retail trade (except motor vehicles) (33 businesses).

Ostrov in numbers

Population (by registered residence)
4,566
ranked 878 of 3,181
−9.3%over 10 years
2016–2026
Population density
26people/km²
ranked 2,577 of 3,163
Area
177km²
ranked 148 of 3,181
Building permits for residential buildings per 1,000 inhabitants
0.22‰
ranked 2,396 of 2,438
Drinking water distributed per inhabitant (m³)
70.3m³
ranked 182 of 2,656
Family doctors per 1,000 inhabitants
0.22‰
ranked 2,606 of 2,807
Tourist overnight stays per inhabitant
0.0nights
ranked 1,070 of 1,250

Where is Ostrov?

Population of Ostrov over time

4,4004,6004,8005,0005,200201620182020202220242026
Population, 2016–2026

Ostrov had 5,036 residents in 2016 and 4,566 in 2026.

YearPopulation (by registered residence)
20214,758
20224,694
20234,659
20244,619
20254,594
20264,566

Did you know?

All indicators for Ostrov

Value for the locality, then the regional average and the national median (for counts: regional and national totals). The gauge places the locality between the lowest and highest value in the country.

OstrovNational medianHover over or tap a bar to see what it shows.

Population

IndicatorOstrovConstanța CountyNationalPosition?Rank
People settling in the municipality per 1,000 inhabitants (2025)11.4 ‰19.2 ‰16.0 ‰ranked 2,582 of 3,163
People leaving the municipality per 1,000 inhabitants (2025)15.5 ‰20.3 ‰17.3 ‰ranked 2,030 of 3,163
Live births per 1,000 inhabitants (2025)10.5 ‰6.6 ‰6.9 ‰ranked 363 of 3,157
Deaths per 1,000 inhabitants (2025)13.4 ‰10.7 ‰13.0 ‰ranked 1,460 of 3,163

Housing

IndicatorOstrovConstanța CountyNationalPosition?Rank
Length of the drinking-water network per 1,000 inhabitants (2025)5.65 km4.56 km7.67 kmranked 1,880 of 2,728
Building permits for residential buildings per 1,000 inhabitants (2025)0.22 ‰2.01 ‰1.53 ‰ranked 2,396 of 2,438
Existing dwellings (2025)2,261341,46310,177,161ranked 745 of 3,181
Dwellings per 1,000 inhabitants (2025)495.2 ‰459.8 ‰484.8 ‰ranked 1,462 of 3,163
Average living floor area per dwelling (m²) (2025)52.6 m²50.3 m²50.3 m²ranked 1,301 of 3,163

Economy

IndicatorOstrovConstanța CountyNationalPosition?Rank
Active companies in the trade register per 1,000 inhabitants (2026)14.0 ‰66.2 ‰29.4 ‰ranked 2,861 of 3,163
Companies registered in the last 12 months per 1,000 inhabitants (2026)1.53 ‰4.12 ‰2.10 ‰ranked 2,122 of 3,163

Employment

IndicatorOstrovConstanța CountyNationalPosition?Rank
Average number of employees per 1,000 inhabitants (2024)84 ‰259 ‰71 ‰ranked 1,283 of 3,163
Registered unemployed as a share of labour resources (working-age population) (2026)5.1%1.3%2.3%ranked 684 of 3,163

Tourism

IndicatorOstrovConstanța CountyNationalPosition?Rank
Tourist overnight stays per inhabitant (2025)0.0 nights10.00.4ranked 1,070 of 1,250
Tourist arrivals per 1,000 inhabitants (2025)23 ‰3,251 ‰200 ‰ranked 1,085 of 1,250
Tourist accommodation places per 1,000 inhabitants (2025)6.6 ‰217.5 ‰11.8 ‰ranked 939 of 1,362

Environment

IndicatorOstrovConstanța CountyNationalPosition?Rank
Drinking water distributed per inhabitant (m³) (2025)70.3 m³54.9 m³27.2 m³ranked 182 of 2,656
Length of the sewer network per 1,000 inhabitants (2025)1.62 km2.97 km4.05 kmranked 1,414 of 1,695

Health

IndicatorOstrovConstanța CountyNationalPosition?Rank
Doctors per 1,000 inhabitants (2024)0.66 ‰3.89 ‰0.52 ‰ranked 989 of 2,833
Family doctors per 1,000 inhabitants (2024)0.22 ‰0.61 ‰0.46 ‰ranked 2,606 of 2,807
Pharmacists per 1,000 inhabitants (2024)0.66 ‰1.47 ‰0.47 ‰ranked 625 of 2,248

Education

IndicatorOstrovConstanța CountyNationalPosition?Rank
School population (children, pupils and students) per 1,000 inhabitants (2025)122 ‰179 ‰91 ‰ranked 669 of 3,158
Education units per 10,000 inhabitants (2025)2.2 per 10,000 inh.2.8 per 10,000 inh.3.6 per 10,000 inh.ranked 2,489 of 3,122

Businesses by activity: Ostrov

Active businesses in the business register with a recorded activity, by section and by activity (NACE Rev. 2). Only activities with at least 3 businesses are shown.

By industry section

Most common activities

Frequently asked questions

What is the population of Ostrov?

Ostrov has 4,566 residents (2026), ranking 878 of 3,181 localities.

How big is Ostrov?

Ostrov covers 177.1 km², with a density of 26 people per km².

Is the population of Ostrov growing?

Between 2016 and 2026, the population of Ostrov went from 5,036 to 4,566, a change of −9.3%.

Where is Ostrov?

Ostrov is in Constanța County. Latitude 44.102, longitude 27.402.

Building permits for residential buildings per 1,000 inhabitants: what is the figure for Ostrov?

In Ostrov, “Building permits for residential buildings per 1,000 inhabitants” stands at 0.22 ‰ (2025), ranking 2,396 of 2,438 localities; the national median is 1.53 ‰.

Drinking water distributed per inhabitant (m³): what is the figure for Ostrov?

In Ostrov, “Drinking water distributed per inhabitant (m³)” stands at 70.3 m³ (2025), ranking 182 of 2,656 localities; the national median is 27.2 m³.

Which localities border Ostrov?

The nearest to Ostrov are Modelu (11 km), Călărași (12 km), Lipnița (13 km), Roseți (15 km), Dichiseni (18 km).