Province·Marmara Region·Code 11
TÜİK · ADNKS 2025The most common surnames in Bilecik
As in Türkiye as a whole, the most common surname in Bilecik is Yılmaz: 3,322 people in 2025. Kaya is second with 2,574. Yılmaz has led Bilecik every year since 2018.1
- First place
- Yılmaz
- Surnames listed
- 301
The 30 most common surnames in Bilecik, 2025
| Rank | Surname | People | Per 1,000 | National rank |
|---|---|---|---|---|
| 01 | Yılmaz | 3,322 | 14.5 | 1 |
| 02 | Kaya | 2,574 | 11.2 | 2 |
| 03 | Çelik | 2,491 | 10.9 | 4 |
| 04 | Demir | 2,479 | 10.8 | 3 |
| 05 | Yıldırım | 1,963 | 8.6 | 7 |
| 06 | Şahin | 1,942 | 8.5 | 6 |
| 07 | Yıldız | 1,748 | 7.6 | 5 |
| 08 | Öztürk | 1,707 | 7.5 | 8 |
| 09 | Aydın | 1,670 | 7.3 | 9 |
| 10 | Özdemir | 1,367 | 6.0 | 10 |
| 11 | Ünal | 1,181 | 5.2 | – |
| 12 | Çakır | 1,163 | 5.1 | 24 |
| 13 | Arslan | 1,157 | 5.1 | 11 |
| 14 | Kara | 1,055 | 4.6 | 16 |
| 15 | Çetin | 1,027 | 4.5 | 15 |
| 16 | Can | 958 | 4.2 | 27 |
| 17 | Kılıç | 943 | 4.1 | 13 |
| 18 | Doğan | 940 | 4.1 | 12 |
| 19 | Özkan | 931 | 4.1 | 22 |
| 20 | Kurt | 917 | 4.0 | 17 |
| 21 | Güven | 897 | 3.9 | – |
| 22 | Uysal | 858 | 3.7 | – |
| 23 | Köse | 794 | 3.5 | – |
| 24 | Turan | 789 | 3.4 | – |
| 25 | Şen | 780 | 3.4 | – |
| 26 | Avcı | 771 | 3.4 | – |
| 27 | Sarı | 745 | 3.3 | – |
| 28 | Keskin | 737 | 3.2 | – |
| 29 | Özcan | 710 | 3.1 | 25 |
| 30 | Yavuz | 704 | 3.1 | 23 |
How do these counts compare with Bilecik’s population?
With an ADNKS population of 228,995 in 2025, about 14.5 in every 1,000 people in Bilecik are called Yılmaz. The 30 listed surnames together cover 39,320 people, 17.2% of the population.1,2
Bilecik lies in the Marmara Region. According to ADNKS its population grew by 2.5% between 2018 and 2025.2
| 2018 | 223,448 |
|---|---|
| 2019 | 219,427 |
| 2020 | 218,717 |
| 2021 | 228,334 |
| 2022 | 228,673 |
| 2023 | 228,058 |
| 2024 | 228,495 |
| 2025 | 228,995 |
Which surname leads in the neighbouring provinces?
- BoluBolu: also Yılmaz, with 6,106 people in 2025, 1.8 times as many as in Bilecik.
- BursaBursa: also Yılmaz, with 46,316 people in 2025, 13.9 times as many as in Bilecik.
- EskişehirEskişehir: also Yılmaz, with 12,337 people in 2025, 3.7 times as many as in Bilecik.
- KütahyaKütahya: also Yılmaz, with 6,301 people in 2025, 1.9 times as many as in Bilecik.
- SakaryaSakarya: also Yılmaz, with 17,597 people in 2025, 5.3 times as many as in Bilecik.
Neighbours: land borders derived from Natural Earth boundaries.3
Has Bilecik’s top three changed over the years?
| Year | 1. | 2. | 3. |
|---|---|---|---|
| 2018 | Yılmaz 3,260 | Kaya 2,486 | Çelik 2,402 |
| 2019 | Yılmaz 3,261 | Kaya 2,419 | Çelik 2,366 |
| 2020 | Yılmaz 3,258 | Kaya 2,464 | Çelik 2,337 |
| 2021 | Yılmaz 3,404 | Kaya 2,587 | Çelik 2,414 |
| 2022 | Yılmaz 3,432 | Kaya 2,623 | Çelik 2,457 |
| 2023 | Yılmaz 3,366 | Kaya 2,591 | Çelik 2,475 |
| 2024 | Yılmaz 3,352 | Kaya 2,589 | Çelik 2,465 |
| 2025 | Yılmaz 3,322 | Kaya 2,574 | Çelik 2,491 |
Sources
- 1Türkiye İstatistik Kurumu (TÜİK) · ADNKS, TÜİK Nüfus İsim Portalı: En çok kullanılan soyisimler (ADNKS)
- 2Türkiye İstatistik Kurumu (TÜİK) · ADNKS, TÜİK ADNKS: Cinsiyete göre nüfus, Türkiye ve 81 il
- 3Natural Earth, Natural Earth: Admin-1 boundaries