| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 801 | Doaen | Kherai BO | 📍 841231 | Andar | Branch Post Office |
| 802 | Dobhia | Kanhauli BO | 📍 841235 | Darauli | Branch Post Office |
| 803 | Dobi Tola | Saraya Sah Mohamd BO | 📍 841506 | Goriakothi | Branch Post Office |
| 804 | Doctor Colony | Siwan HO | 📍 841226 | Siwan | Head Post Office - H |
| 805 | Dodhara | Goreakothi SO | 📍 841434 | Goriakothi | Post Office - PO |
| 806 | Domanpura | Raghunathpur SO Siwan | 📍 841504 | Raghunathpur | Post Office - PO |
| 807 | Domdih | Seotapur BO | 📍 841239 | Mairwa | Branch Post Office |
| 808 | Domdish Ansari tola | Seotapur BO | 📍 841239 | Mairwa | Branch Post Office |
| 809 | Domdish Koiri Tola | Seotapur BO | 📍 841239 | Mairwa | Branch Post Office |
| 810 | Domdish Mauje | Seotapur BO | 📍 841239 | Mairwa | Branch Post Office |
| 811 | Don Buzurg | Done SO | 📍 841235 | Darauli | Post Office - PO |
| 812 | Don Khurd | Done SO | 📍 841235 | Darauli | Post Office - PO |
| 813 | Dr Colony | Benusar BO | 📍 841227 | Siwan | Branch Post Office |
| 814 | DR L B Chaudhary | Siwan HO | 📍 841226 | Siwan | Head Post Office - H |
| 815 | DR vinay kr sharma | Siwan HO | 📍 841226 | Siwan | Head Post Office - H |
| 816 | Duba | Darauli SO | 📍 841234 | Darauli | Post Office - PO |
| 817 | Dubey Tola | Hatimpur BO | 📍 841413 | Barharia | Branch Post Office |
| 818 | Dudaha | Karsar BO | 📍 841504 | Raghunathpur | Branch Post Office |
| 819 | Dudahi Tola | Asaon SO | 📍 841287 | Andar | Post Office - PO |
| 820 | dudha | Miyan Ke Bhatkan BO | 📍 841245 | Ziradei | Branch Post Office |
| 821 | Dudhar Bazar | Goreakothi SO | 📍 841434 | Goriakothi | Post Office - PO |
| 822 | Dudhara Mathia | Goreakothi SO | 📍 841434 | Goriakothi | Post Office - PO |
| 823 | Dudhara Ojha Tola | Goreakothi SO | 📍 841434 | Goriakothi | Post Office - PO |
| 824 | Dudhara Subuka Tola | Goreakothi SO | 📍 841434 | Goriakothi | Post Office - PO |
| 825 | Dudhara Takiya | Goreakothi SO | 📍 841434 | Goriakothi | Post Office - PO |
| 826 | Dudhra | Dudhra BO | 📍 841434 | Goriakothi | Branch Post Office |
| 827 | Dudhwalia | Tiyan BO | 📍 841231 | Andar | Branch Post Office |
| 828 | Dudhwalia | Khujhwa SO | 📍 841502 | Raghunathpur | Post Office - PO |
| 829 | Duli Baba college Basti | Gangpur Siswan SO | 📍 841210 | Siswan | Post Office - PO |
| 830 | Dumar Chhapra | Bargaon BO | 📍 841239 | Mairwa | Branch Post Office |
| 831 | Dumarahar Buzurg | Dumrahar BO | 📍 841435 | Darauli | Branch Post Office |
| 832 | Dumarahar Khurd | Dumrahar BO | 📍 841435 | Darauli | Branch Post Office |
| 833 | Dumarahar Khurd Diara | Dumrahar BO | 📍 841435 | Darauli | Branch Post Office |
| 834 | Dumari | K.T.Bharouli BO | 📍 841404 | Daraundha | Post Office - PO |
| 835 | Dumra | Dumra BO | 📍 841416 | Goriakothi | Branch Post Office |
| 836 | Dumra | Kishunpura SO | 📍 841416 | Lakri Nabiganj | Post Office - PO |
| 837 | Dumrahar Diara | Dumrahar BO | 📍 841435 | Darauli | Branch Post Office |
| 838 | Dumri | Barhria SO | 📍 841232 | Barharia | Post Office - PO |
| 839 | Dumri | K.T.Bharauli BO | 📍 841404 | Daraundha | Post Office - PO |
| 840 | Dunia Tola | Karanpura BO | 📍 841506 | Goriakothi | Branch Post Office |
| 841 | Duraundha | Daronda SO | 📍 841233 | Daraundha | Post Office - PO |
| 842 | Dusadh Tola | Saraya Sah Mohamd BO | 📍 841506 | Goriakothi | Branch Post Office |
| 843 | Dusamiya Tola | Hardia BO | 📍 841226 | Pachrukhi | Branch Post Office |
| 844 | Dushad Tola Tarwara | Tarwara SO | 📍 841506 | Pachrukhi | Post Office - PO |
| 845 | Dushadh Tola Chaukihasan | Chaukihasan BO | 📍 841506 | Barharia | Branch Post Office |
| 846 | Dushi | Bishwania BO | 📍 841234 | Darauli | Branch Post Office |
| 847 | East KHalwa | Khalwa BO | 📍 841243 | Nautan | Branch Post Office |
| 848 | Edilpur | Panjwar BO | 📍 841509 | Raghunathpur | Branch Post Office |
| 849 | Ekawantola | Saidpura BO | 📍 841439 | Goriakothi | Branch Post Office |
| 850 | Ekdanga | B.P.Ekderwsa BO | 📍 841243 | Nautan | Branch Post Office |