| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Dagyenice | city | Istanbul Ili | Turkey | 41.2747222 | 28.4852778 | 213 | 185064 |
| Danamandira | city | Istanbul Ili | Turkey | 41.31 | 28.2455556 | 626 | 171281 |
| Danamandıra | city | Istanbul Ili | Turkey | 41.31 | 28.2455556 | 626 | 171281 |
| Darlik | city | Istanbul Ili | Turkey | 41.0755556 | 29.5941667 | 380 | 185652 |
| Darlikkoyu | city | Istanbul Ili | Turkey | 41.0755556 | 29.5941667 | 380 | 185652 |
| Darlık | city | Istanbul Ili | Turkey | 41.0755556 | 29.5941667 | 380 | 185652 |
| Darlıkköyü | city | Istanbul Ili | Turkey | 41.0755556 | 29.5941667 | 380 | 185652 |
| Davud Pasa | city | Istanbul Ili | Turkey | 41 | 28.9333333 | 0 | 57342 |
| Davutpasa | city | Istanbul Ili | Turkey | 41 | 28.9333333 | 0 | 57342 |
| Davutpaşa | city | Istanbul Ili | Turkey | 41 | 28.9333333 | 0 | 57342 |
| Dağyenice | city | Istanbul Ili | Turkey | 41.2747222 | 28.4852778 | 213 | 185064 |
| Degirmencayiri | city | Istanbul Ili | Turkey | 40.9775 | 29.6619444 | 770 | 169312 |
| Deliklikaya | city | Istanbul Ili | Turkey | 41.1136111 | 28.6519444 | 337 | 184880 |
| Deliyunus | city | Istanbul Ili | Turkey | 41.2833333 | 28.5833333 | 246 | 185064 |
| Demircili | city | Istanbul Ili | Turkey | 41.05 | 29.65 | 600 | 185652 |
| Dereseki | city | Istanbul Ili | Turkey | 41.1536111 | 29.1305556 | 633 | 174346 |
| Değirmençayırı | city | Istanbul Ili | Turkey | 40.9775 | 29.6619444 | 770 | 169312 |
| Dil | city | Istanbul Ili | Turkey | 40.8166667 | 29.2833333 | 0 | 4772 |
| Dogancili | city | Istanbul Ili | Turkey | 41.2 | 29.4166667 | 72 | 129677 |
| Dolayba | city | Istanbul Ili | Turkey | 40.8891667 | 29.2483333 | 242 | 103594 |
| Dolaybakoy | city | Istanbul Ili | Turkey | 40.8891667 | 29.2483333 | 242 | 103594 |
| Dolaybaköy | city | Istanbul Ili | Turkey | 40.8891667 | 29.2483333 | 242 | 103594 |
| Dolayoba | city | Istanbul Ili | Turkey | 40.8891667 | 29.2483333 | 242 | 103594 |
| Dolma Bagche | city | Istanbul Ili | Turkey | 41.0333333 | 28.9833333 | 3 | 106552 |
| Dolmabache | city | Istanbul Ili | Turkey | 41.0333333 | 28.9833333 | 3 | 106552 |
| Dolmabahce | city | Istanbul Ili | Turkey | 41.0333333 | 28.9833333 | 3 | 106552 |
| Dolmabahçe | city | Istanbul Ili | Turkey | 41.0333333 | 28.9833333 | 3 | 106552 |
| Domali | city | Istanbul Ili | Turkey | 41.2 | 29.4 | 65 | 142138 |
| Domalı | city | Istanbul Ili | Turkey | 41.2 | 29.4 | 65 | 142138 |
| Doğancılı | city | Istanbul Ili | Turkey | 41.2 | 29.4166667 | 72 | 129677 |
| Dudullu | city | Istanbul Ili | Turkey | 41.0183333 | 29.1652778 | 383 | 185290 |
| Dumali | city | Istanbul Ili | Turkey | 41.2 | 29.4 | 65 | 142138 |
| Dursunkoy | city | Istanbul Ili | Turkey | 41.2072222 | 28.6341667 | 124 | 185301 |
| Dursunköy | city | Istanbul Ili | Turkey | 41.2072222 | 28.6341667 | 124 | 185301 |
| Durusu | city | Istanbul Ili | Turkey | 41.3052778 | 28.6766667 | 141 | 151473 |
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