Population on 1 January by age group, sex and NUTS 2 region in Kocaeli, Sakarya, Düzce, Bolu, Yalova
Kocaeli, Sakarya, Düzce, Bolu, Yalova: Population on 1 January by age group, sex and NUTS 2 region was 4.29 million in 2025. ▲ Rising
Population on 1 January by age group, sex and NUTS 2 region in Kocaeli, Sakarya, Düzce, Bolu, Yalova, 2008–2025
Source: Eurostat.
Analysis
Kocaeli, Sakarya, Düzce, Bolu, Yalova recorded 4.29 million for population on 1 january by age group, sex and nuts 2 region in 2025. That is the highest value across all 18 years on record.
That represents a change of up 1.1% on the previous year and up 21.7% over ten years.
Over the whole period, population on 1 january by age group, sex and nuts 2 region in Kocaeli, Sakarya, Düzce, Bolu, Yalova peaked at 4.29 million in 2025 and was at its lowest, 3.05 million, in 2008.
That places Kocaeli, Sakarya, Düzce, Bolu, Yalova 78th out of 442 regions with data for 2025, putting it in the top quarter.
The long-run direction has been consistently rising across the 18 years of available data.
Population on 1 January by age group, sex and NUTS 2 region in Kocaeli, Sakarya, Düzce, Bolu, Yalova, year by year
| Year | Value | Change |
|---|---|---|
| 2008 | 3.05 million | — |
| 2009 | 3.14 million | +2.9% |
| 2010 | 3.19 million | +1.8% |
| 2011 | 3.25 million | +1.7% |
| 2012 | 3.32 million | +2.1% |
| 2013 | 3.38 million | +1.8% |
| 2014 | 3.45 million | +2.1% |
| 2015 | 3.52 million | +2.1% |
| 2016 | 3.62 million | +2.7% |
| 2017 | 3.72 million | +2.8% |
| 2018 | 3.81 million | +2.3% |
| 2019 | 3.88 million | +1.9% |
| 2020 | 3.96 million | +2.1% |
| 2021 | 4.03 million | +1.6% |
| 2022 | 4.11 million | +2.0% |
| 2023 | 4.18 million | +1.8% |
| 2024 | 4.24 million | +1.4% |
| 2025 | 4.29 million | +1.1% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 2000s | 3.09 million | 3.05 million | 3.14 million | 2 |
| 2010s | 3.51 million | 3.19 million | 3.88 million | 10 |
| 2020s | 4.13 million | 3.96 million | 4.29 million | 6 |
More population data for Kocaeli, Sakarya, Düzce, Bolu, Yalova
- Population on 1 January by age, sex and NUTS 2 region 4.29 million (2025)
- Animal populations by NUTS 2 region 528.7 (2025)
- Live births (total) by NUTS 3 region 44,865 (2024)
- Population density by NUTS 3 region 212.1 (2024)
- Population on 1 January by broad age group, sex and NUTS 3 region 4.29 million (2025)
- Live births by mother's age and NUTS 2 region 44,865 (2024)
- Fertility rates by age and NUTS 2 region 1.41 (2024)
- Population in private households by educational attainment level and 3,224 (2025)
- Population in private households by educational attainment level and 16.1 (2025)
- Population change - Demographic balance and crude rates at regional 26,369 (2024)
Frequently asked questions
- What is population on 1 january by age group, sex and nuts 2 region in Kocaeli, Sakarya, Düzce, Bolu, Yalova?
- Population on 1 january by age group, sex and nuts 2 region in Kocaeli, Sakarya, Düzce, Bolu, Yalova was 4.29 million in 2025, according to Eurostat.
- What is the highest population on 1 january by age group, sex and nuts 2 region recorded in Kocaeli, Sakarya, Düzce, Bolu, Yalova?
- The highest recorded value was 4.29 million in 2025.
- What is the lowest population on 1 january by age group, sex and nuts 2 region recorded in Kocaeli, Sakarya, Düzce, Bolu, Yalova?
- The lowest recorded value was 3.05 million in 2008.
- How does Kocaeli, Sakarya, Düzce, Bolu, Yalova rank for population on 1 january by age group, sex and nuts 2 region?
- Kocaeli, Sakarya, Düzce, Bolu, Yalova ranks 78th out of 442 regions with data for 2025.
- Is population on 1 january by age group, sex and nuts 2 region rising or falling in Kocaeli, Sakarya, Düzce, Bolu, Yalova?
- Over the last ten years it is up 21.7%. The long-run trend across the full record is rising.
- Where does this Kocaeli, Sakarya, Düzce, Bolu, Yalova data come from?
- The figures come from Eurostat, published as part of Population on 1 January by age group, sex and NUTS 2 region. Statizoid updates them automatically from the source API.
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