Kocaeli, Sakarya, Düzce, Bolu, Yalova: economy, jobs and official figures

Kocaeli, Sakarya, Düzce, Bolu, Yalova is a statistical region of Türkiye, number 5 of 26 by population. Kocaeli, Sakarya, Düzce, Bolu, Yalova had 4,287,376 residents on 1 January 2025, 5.0% of the population of Türkiye and 5th largest of 26 regions in Türkiye. That is 21.7% more than in 2015.

In depth

• Economy, jobs and prices in Kocaeli, Sakarya, Düzce, Bolu, Yalova: GDP per person was 35,000 purchasing power standards (PPS) in 2024, 88% of the EU average; 3rd highest of 26 regions in Türkiye. PPS adjust for price differences between countries.
• Health in Kocaeli, Sakarya, Düzce, Bolu, Yalova: Life expectancy at birth was 76.8 years in 2023 (77.3 for Türkiye); 10th highest of 26 regions in Türkiye.
• Education in Kocaeli, Sakarya, Düzce, Bolu, Yalova: The share of adults aged 25 to 64 with a degree-level (tertiary) education was 27.5% in 2025, against 26.8% for Türkiye and 36.9% across the EU; 5th highest of 26 regions in Türkiye.
• Poverty and living standards in Kocaeli, Sakarya, Düzce, Bolu, Yalova: Using a poverty line of 134,286 lira a year (50% of the regional median), TÜİK found a relative poverty rate of 7.0% in the Kocaeli, Sakarya, Düzce, Bolu, Yalova region (TR42) in 2025, 4th lowest of 26 regions; the national rate on the same basis was 13.0%.

Provinces in Kocaeli, Sakarya, Düzce, Bolu, Yalova

Kocaeli, Sakarya, Düzce, Bolu, Yalova is made up of 5 provinces. Each has its own page of official figures.

• Kocaeli 2,130,006
• Sakarya 1,110,735
• Düzce 412,344
• Bolu 326,409
• Yalova 307,882

How statistical regions are governed in Türkiye

Provinces (81). Governor (vali) appointed by the President. Chief state official in the province; supervises local governments and security.

Every tier of government in Türkiye

This is one of the EU's NUTS 2 statistical regions, which Eurostat uses to compare regions across Europe. It does not always match a level of government in Türkiye.

Other statistical regions of Türkiye

• İstanbul 15,701,602
• Ankara 5,864,049
• İzmir 4,493,242
• Bursa, Eskişehir, Bilecik 4,388,743
• Adana, Mersin 4,234,763
• Şanlıurfa, Diyarbakır 4,071,429
• Antalya, Isparta, Burdur 3,444,338
• Aydın, Denizli, Muğla 3,309,181
• Hatay, Kahramanmaraş, Osmaniye 3,257,351
• Manisa, Afyonkarahisar, Kütahya, Uşak 3,171,934
• Gaziantep, Adıyaman, Kilis 2,961,139
• Samsun, Tokat, Çorum, Amasya 2,858,763
• Trabzon, Ordu, Giresun, Rize, Artvin, Gümüşhane 2,707,777
• Konya, Karaman 2,592,815
• Kayseri, Sivas, Yozgat 2,502,626
• Mardin, Batman, Şırnak, Siirt 2,457,718
• Van, Muş, Bitlis, Hakkari 2,152,387
• Tekirdağ, Edirne, Kırklareli 1,987,440
• Balıkesir, Çanakkale 1,845,062
• Malatya, Elazığ, Bingöl, Tunceli 1,724,320
• Kırıkkale, Aksaray, Niğde, Nevşehir, Kırşehir 1,657,733
• Ağrı, Kars, Iğdır, Ardahan 1,070,312
• Erzurum, Erzincan, Bayburt 1,069,920
• Zonguldak, Karabük, Bartın 1,043,995
• Kastamonu, Çankırı, Sinop 808,929

Up a level: Türkiye · government and power in Türkiye · cities

Sources

• Eurostat: Eurostat dataset demo_r_d2jan: Population on 1 January, read 23 October 2026 · saved copy (SHA-256 1572e74fa245…)
• Eurostat: Eurostat dataset demo_r_d3dens: Population density, read 23 October 2026 · saved copy (SHA-256 f4b59fe9d121…)
• Eurostat: Eurostat dataset nama_10r_2gdp: GDP per person (purchasing power standards), read 23 October 2026 · saved copy (SHA-256 c21f724d14a6…)
• Eurostat: Eurostat dataset nama_10r_2gdp: GDP per person (euros), read 23 October 2026 · saved copy (SHA-256 537f99167955…)
• Eurostat: Eurostat dataset nama_10r_2gdp: GDP (million euros), read 23 October 2026 · saved copy (SHA-256 e3677c4e6d67…)
• Eurostat: Eurostat dataset lfst_r_lfu3rt: Unemployment rate (age 15-74), read 23 October 2026 · saved copy (SHA-256 13f5037ce93a…)
• Eurostat: Eurostat dataset lfst_r_lfu3rt: Youth unemployment rate (age 15-24), read 23 October 2026 · saved copy (SHA-256 83bb1aebc10b…)
• Eurostat: Eurostat dataset lfst_r_lfe2emprt: Employment rate (age 20-64), read 23 October 2026 · saved copy (SHA-256 03191283bf5f…)
• Eurostat: Eurostat dataset demo_r_mlifexp: Life expectancy at birth, read 23 October 2026 · saved copy (SHA-256 62800ed9bbb3…)
• Eurostat: Eurostat dataset edat_lfse_04: Adults (25-64) with a degree-level education, read 23 October 2026 · saved copy (SHA-256 6ff9f4bfff72…)
• Eurostat: Eurostat dataset rd_e_gerdreg: Research and development spending (% of GDP), read 23 October 2026 · saved copy (SHA-256 36a9132b2284…)
• Eurostat: Eurostat dataset demo_r_fagec: Live births, read 23 October 2026 · saved copy (SHA-256 6a1490d549d5…)
• Eurostat: Eurostat dataset demo_r_magec: Deaths, read 23 October 2026 · saved copy (SHA-256 d4821a589633…)
• Eurostat: Eurostat dataset reg_area3: Area, read 23 October 2026 · saved copy (SHA-256 75302b0aafe9…)
• Eurostat: Eurostat dataset lfst_r_lfe2emprt: Employment rates by sex, age and NUTS 2 region, read 23 October 2026 · saved copy (SHA-256 51bfca80dc8b…)
• Eurostat: Eurostat dataset demo_r_mlifexp: Life expectancy by age, sex and NUTS 2 region, read 23 October 2026 · saved copy (SHA-256 f5a2a33406b9…)
• Eurostat: Eurostat dataset lfst_r_lfu3rt: Unemployment rates by sex, age, educational attainment level and NUTS 2 region, read 23 October 2026 · saved copy (SHA-256 ac151d8a46d5…)
• Eurostat: Eurostat dataset educ_uoe_enra11: Pupils and students enrolled by education level, sex and NUTS 2 region, read 23 October 2026 · saved copy (SHA-256 20b6224cca4f…)
• Eurostat: Eurostat dataset demo_r_minfind: Infant mortality rates by NUTS 2 region, read 23 October 2026 · saved copy (SHA-256 60cbafea3657…)
• Turkish Statistical Institute (TÜİK): Income Distribution Statistics 2025: distribution of annual equivalised household disposable income by quintile, Türkiye and NUTS2 regions, 2014-2025, read 23 October 2026 · saved copy (SHA-256 b49635410b76…)
• Eurostat: Eurostat dataset tran_r_vehst: Stock of vehicles by category and NUTS 2 region, read 23 October 2026 · saved copy (SHA-256 5adf37bcb393…)
• Eurostat: Eurostat dataset hlth_rs_physreg: Physicians by NUTS 2 region, read 23 October 2026 · saved copy (SHA-256 4ff68eb77f8b…)
• Eurostat: Eurostat dataset edat_lfse_04: Population aged 25-64 by educational attainment level, sex and NUTS 2 region, read 23 October 2026 · saved copy (SHA-256 63810622cd71…)
• Eurostat: Eurostat dataset trng_lfse_04: Participation rate of adults in education and training (last 4 weeks) by NUTS 2 region, read 23 October 2026 · saved copy (SHA-256 42ceced85786…)
• Eurostat: Eurostat dataset lfst_r_lfu2ltu: Long-term unemployment (12 months and more) by NUTS 2 region, read 23 October 2026 · saved copy (SHA-256 3d5d17a32863…)
• Eurostat: Eurostat dataset demo_r_find2: Fertility indicators by NUTS 2 region, read 23 October 2026 · saved copy (SHA-256 d3f275c072bc…)
• Eurostat: Eurostat dataset hlth_cd_asdr2: Causes of death: standardised death rate by NUTS 2 region of residence, read 23 October 2026 · saved copy (SHA-256 308c4b705d5d…)
• Turkish Statistical Institute (TÜİK): Annual and Regional Labour Force Statistics 2025: main labour force indicators by sex and NUTS2 region, 2020-2025, read 23 October 2026 · saved copy (SHA-256 424645758599…)
• Eurostat: Eurostat dataset tour_occ_nin2: Nights spent at tourist accommodation establishments by NUTS 2 region, read 23 October 2026 · saved copy (SHA-256 06f6a82909c0…)
• Turkish Statistical Institute (TÜİK): Regional Purchasing Power Parity 2024: regional price level indices by main consumption expenditure group, 26 NUTS2 regions (Türkiye = 100), read 23 October 2026 · saved copy (SHA-256 61c00aeab8aa…)
• Eurostat: Eurostat dataset edat_lfse_16: Early leavers from education and training by sex and NUTS 2 region, read 23 October 2026 · saved copy (SHA-256 c3cc66b98a4a…)
• Eurostat: Eurostat dataset hlth_rs_bdsrg2: Hospital beds by NUTS 2 region, read 23 October 2026 · saved copy (SHA-256 3178c155028f…)
• Eurostat: Eurostat dataset tran_r_acci: Victims in road accidents by NUTS 2 region, read 23 October 2026 · saved copy (SHA-256 a183ad1f888d…)
• Turkish Statistical Institute (TÜİK): Poverty and Living Conditions Statistics 2025: relative poor and poverty rate by poverty line calculated separately for each NUTS2 region, 2014-2025, read 23 October 2026 · saved copy (SHA-256 433099c43599…)
• Eurostat: Eurostat dataset nama_10r_3gva: Gross value added at basic prices by NUTS 3 region and industry, read 23 October 2026 · saved copy (SHA-256 c656e8563bdf…)
• Turkish Statistical Institute (TÜİK): National Education Statistics: population by completed level of education, sex and province (dataflow DF_ULUSAL_EGITIM_ISTATISTIK_BED_NUFUS), 2008-2025, read 23 October 2026 · saved copy (SHA-256 d9b9d5df5912…)
• Eurostat: Eurostat dataset edat_lfse_22: Young people neither in employment nor in education and training (NEET) by NUTS 2 region, read 23 October 2026 · saved copy (SHA-256 1467a7225373…)

Each saved copy is the file exactly as downloaded, kept so the figures can be checked even if the source changes. Report an error.