| Box Width: | 30em |
| Istanbul–Çerkezköy Regional | |
| Type: | Regional |
| Status: | Operating |
| Locale: | European Turkey |
| Operator: | TCDD |
| Start: | Halkalı station, Istanbul |
| Stops: | 4 |
| End: | Çerkezköy station, Çerkezköy |
| Journeytime: | 2 hours, 20 minutes |
| Frequency: | Daily each way |
| Trainnumber: | 81602 (westbound), 81601 (eastbound) |
| Map State: | collapsed |
The Istanbul–Çerkezköy Regional is a regional rail service between Sirkeci station in Istanbul and Çerkezköy, a town in Thracian Turkey. Train #81602 operates between Istanbul and Çerkezköy and train #81601 operates between Çerkezköy and Istanbul daily.