| Country: | TUR |
| Type: | D |
| Route: | 850 |
| Map: | D 850 harita.svg |
| Length Km: | 852 |
| Direction A: | North |
| Terminus A: | Ünye (Black Sea coast) |
| Direction B: | South |
| Terminus B: | Öncüpınar (Syrian border) |
D.850 is a north-to-south state road in Turkey. It starts at Ünye at the Black Sea coast and ends at Öncüpınar, which hosts a Turkish border check point with Syria.[1] Since it runs all the way from north to south, it crosses the three main west-to-east highways, namely the D.100, D.300 and D.400.
| Province | Location | Distance from Ünye (km) | Distance from Ünye (mile) | Distance from Öncüpınar (km) | Distance from Öncüpınar (mile) |
|---|---|---|---|---|---|
| Ordu | Ünye | 0 | 0 | 852 | 529 |
| Niksar | 107 | 66 | 745 | 463 | |
| Tokat | 161 | 100 | 691 | 429 | |
| Yıldızeli | 222 | 138 | 630 | 391 | |
| Sivas | 263 | 163 | 589 | 366 | |
| Gürün | 405 | 252 | 447 | 278 | |
| Darende | 441 | 271 | 411 | 255 | |
| Malatya[2] | 532 | 331 | 320 | 199 | |
| Gölbaşı | 632 | 393 | 220 | 137 | |
| Besni | 675 | 419 | 177 | 110 | |
| Araban | 714 | 444 | 138 | 86 | |
| Gaziantep | 779 | 484 | 73 | 45 | |
| Kilis | 884 | 524 | 8 | 5 | |
| Öncüpınar | 852 | 529 | 0 | 0 |