Gaziantep's 2025 population is now estimated at 1,858,710. In 1950, the population of Gaziantep was 103,757. Gaziantep has grown by 25,700 in the last year, which represents a 1.4% annual change.These population estimates and projections come from the latest revision of the UN World Urbanization Prospects. These estimates represent the Urban agglomeration of Gaziantep, which typically includes Gaziantep's population in addition to adjacent suburban areas.
| City | 2025 Pop. ↓ | Growth |
|---|---|---|
| Istanbul | 16,236,700 | 1.18% |
| Ankara | 5,550,490 | 1.34% |
| Izmir | 3,152,090 | 1.02% |
| Bursa | 2,142,600 | 1.28% |
| Adana | 1,876,820 | 1.09% |
| Gaziantep | 1,858,710 | 1.4% |
| Konya | 1,450,150 | 1.41% |
| Antalya | 1,394,590 | 1.62% |
| Diyarbakir | 1,128,360 | 1.35% |
| Mersin | 1,099,040 | 1.31% |
| Kayseri | 1,037,250 | 1.15% |
| Eskisehir | 860,518 | 1.48% |
| Gebze | 846,841 | 1.86% |
| Samsun | 718,641 | 1.68% |
| Denizli | 712,016 | 1.54% |
| Sanliurfa | 622,137 | 1.02% |
| Kahramanmaras | 601,640 | 1.5% |
| Sakarya | 598,340 | 1.59% |
| Van | 578,392 | 1.8% |
| Malatya | 532,469 | 1.23% |
| Batman | 480,040 | 1.48% |
| Erzurum | 467,875 | 1.34% |
| Elazig | 451,906 | 1.56% |
| Manisa | 419,194 | 1.49% |
| Sivas | 401,785 | 1.48% |
| Izmit | 376,464 | 1.34% |
| Balikesir | 354,366 | 1.6% |
