Castelu: population and statistics
Castelu has a population of 5,927 (2026) across 58.4 km², or 101 people per km². It ranks 582 of 3,181 localities by population. Its population is growing: +9.4% between 2016 and 2026.
- 5,927 residents
- 58.4 km²
- 101 people/km²
Key points
Among the 70 localities in Constanța County, Castelu ranks No. 22 by population.
Dwellings per 1,000 inhabitants: 253.6 ‰ in Castelu, compared with an average of 459.8 ‰ in Constanța County and 470.2 ‰ nationally.
Live births per 1,000 inhabitants: 16.9 ‰ in Castelu, compared with an average of 6.6 ‰ in Constanța County and 6.7 ‰ nationally.
Castelu: the most common activity among active businesses is Retail trade (except motor vehicles) (61 businesses).
Castelu in numbers
Where is Castelu?
Population of Castelu over time
Castelu had 5,419 residents in 2016 and 5,927 in 2026.
| Year | Population (by registered residence) |
|---|---|
| 2021 | 5,640 |
| 2022 | 5,674 |
| 2023 | 5,701 |
| 2024 | 5,771 |
| 2025 | 5,843 |
| 2026 | 5,927 |
Did you know?
- “Dwellings per 1,000 inhabitants”: lower than in 99% of localities.
- “Live births per 1,000 inhabitants”: higher than in 99% of localities.
- “Doctors per 1,000 inhabitants”: lower than in 97% of localities.
- Its area is roughly equal to 8,185 football pitches.
- The nearest locality is Cuza Vodă, 6.6 km away.
- The nearest more populous locality is Medgidia (41,688 residents), 8.8 km away.
All indicators for Castelu
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.
Population
| Indicator | Castelu | Constanța County | National | Position? | Rank |
|---|---|---|---|---|---|
| People settling in the municipality per 1,000 inhabitants (2025) | 21.6 ‰ | 19.2 ‰ | 16.0 ‰ | ranked 696 of 3,163 | |
| People leaving the municipality per 1,000 inhabitants (2025) | 16.2 ‰ | 20.3 ‰ | 17.3 ‰ | ranked 1,819 of 3,163 | |
| Live births per 1,000 inhabitants (2025) | 16.9 ‰ | 6.6 ‰ | 6.9 ‰ | ranked 27 of 3,157 | |
| Deaths per 1,000 inhabitants (2025) | 8.9 ‰ | 10.7 ‰ | 13.0 ‰ | ranked 2,788 of 3,163 |
Housing
| Indicator | Castelu | Constanța County | National | Position? | Rank |
|---|---|---|---|---|---|
| Length of the drinking-water network per 1,000 inhabitants (2025) | 5.25 km | 4.56 km | 7.67 km | ranked 1,991 of 2,728 | |
| Building permits for residential buildings per 1,000 inhabitants (2025) | 7.42 ‰ | 2.01 ‰ | 1.53 ‰ | ranked 136 of 2,438 | |
| Existing dwellings (2025) | 1,503 | 341,463 | 10,177,161 | ranked 1,532 of 3,181 | |
| Dwellings per 1,000 inhabitants (2025) | 253.6 ‰ | 459.8 ‰ | 484.8 ‰ | ranked 3,145 of 3,163 | |
| Average living floor area per dwelling (m²) (2025) | 56.9 m² | 50.3 m² | 50.3 m² | ranked 877 of 3,163 | |
| Dwellings completed in the year per 1,000 inhabitants (2025) | 0.17 ‰ | 5.57 ‰ | 1.30 ‰ | ranked 1,875 of 1,926 |
Economy
| Indicator | Castelu | Constanța County | National | Position? | Rank |
|---|---|---|---|---|---|
| Active companies in the trade register per 1,000 inhabitants (2026) | 24.8 ‰ | 66.2 ‰ | 29.4 ‰ | ranked 1,996 of 3,163 | |
| Companies registered in the last 12 months per 1,000 inhabitants (2026) | 2.02 ‰ | 4.12 ‰ | 2.10 ‰ | ranked 1,641 of 3,163 |
Employment
| Indicator | Castelu | Constanța County | National | Position? | Rank |
|---|---|---|---|---|---|
| Average number of employees per 1,000 inhabitants (2024) | 67 ‰ | 259 ‰ | 71 ‰ | ranked 1,656 of 3,163 | |
| Registered unemployed as a share of labour resources (working-age population) (2026) | 6.4% | 1.3% | 2.3% | ranked 492 of 3,163 |
Environment
| Indicator | Castelu | Constanța County | National | Position? | Rank |
|---|---|---|---|---|---|
| Drinking water distributed per inhabitant (m³) (2025) | 27.0 m³ | 54.9 m³ | 27.2 m³ | ranked 1,343 of 2,656 | |
| Length of the sewer network per 1,000 inhabitants (2025) | 1.94 km | 2.97 km | 4.05 km | ranked 1,353 of 1,695 |
Health
| Indicator | Castelu | Constanța County | National | Position? | Rank |
|---|---|---|---|---|---|
| Doctors per 1,000 inhabitants (2024) | 0.17 ‰ | 3.89 ‰ | 0.52 ‰ | ranked 2,750 of 2,833 | |
| Family doctors per 1,000 inhabitants (2024) | 0.17 ‰ | 0.61 ‰ | 0.46 ‰ | ranked 2,708 of 2,807 | |
| Pharmacists per 1,000 inhabitants (2024) | 0.34 ‰ | 1.47 ‰ | 0.47 ‰ | ranked 1,547 of 2,248 |
Education
| Indicator | Castelu | Constanța County | National | Position? | Rank |
|---|---|---|---|---|---|
| School population (children, pupils and students) per 1,000 inhabitants (2025) | 188 ‰ | 179 ‰ | 91 ‰ | ranked 156 of 3,158 | |
| Education units per 10,000 inhabitants (2025) | 1.7 per 10,000 inh. | 2.8 per 10,000 inh. | 3.6 per 10,000 inh. | ranked 2,808 of 3,122 |
Businesses by activity: Castelu
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
- Wholesale and retail trade90 · 26.2%
- Transport and storage57 · 16.6%
- Administrative and support services32 · 9.3%
- Construction29 · 8.4%
- Manufacturing26 · 7.6%
- Professional, scientific and technical19 · 5.5%
- Agriculture, forestry and fishing18 · 5.2%
- Accommodation and food services18 · 5.2%
Most common activities
- Retail trade (except motor vehicles)61 · 17.7%
- Wholesale trade (except motor vehicles)51 · 14.8%
- Land transport and transport via pipelines44 · 12.8%
- Warehousing and transport support activities33 · 9.6%
- Specialised construction activities29 · 8.4%
- Construction of buildings22 · 6.4%
- Rental and leasing activities20 · 5.8%
- Civil engineering18 · 5.2%
- Crop and animal production, hunting and related services17 · 4.9%
- Food and beverage service activities16 · 4.7%
Frequently asked questions
What is the population of Castelu?
Castelu has 5,927 residents (2026), ranking 582 of 3,181 localities.
How big is Castelu?
Castelu covers 58.4 km², with a density of 101 people per km².
Is the population of Castelu growing?
Between 2016 and 2026, the population of Castelu went from 5,419 to 5,927, a change of +9.4%.
Where is Castelu?
Castelu is in Constanța County. Latitude 44.272, longitude 28.367.
Dwellings per 1,000 inhabitants: what is the figure for Castelu?
In Castelu, “Dwellings per 1,000 inhabitants” stands at 253.6 ‰ (2025), ranking 3,145 of 3,163 localities; the national median is 484.8 ‰.
Live births per 1,000 inhabitants: what is the figure for Castelu?
In Castelu, “Live births per 1,000 inhabitants” stands at 16.9 ‰ (2025), ranking 27 of 3,157 localities; the national median is 6.9 ‰.
Which localities border Castelu?
The nearest to Castelu are Cuza Vodă (6.6 km), Poarta Albă (6.7 km), Medgidia (8.8 km), Murfatlar (11 km), Tortoman (12 km).