| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 1051 | Singdaha | Parsa BO | 📍 847109 | Jhanjharpur | Branch Post Office |
| 1052 | Singhaso | Keoti Ranway SO | 📍 847121 | Bisfi | Post Office - PO |
| 1053 | Singhaso | Singhaso BO | 📍 847121 | Bisfi | Branch Post Office |
| 1054 | Singhia | Singhia Deorhi BO | 📍 847306 | Bisfi | Branch Post Office |
| 1055 | Singiaun | Kaithai BO | 📍 847236 | Rajnagar | Branch Post Office |
| 1056 | Singiaun | Pastan BO | 📍 847401 | Andhratharhi | Branch Post Office |
| 1057 | Singrahi | Laukahi BO | 📍 847108 | Laukahi | Branch Post Office |
| 1058 | Sipahgiri | Mirjapur BO | 📍 847232 | Ladania | Branch Post Office |
| 1059 | Sipipatti | Shibipatti BO | 📍 847215 | Rajnagar | Branch Post Office |
| 1060 | Sirahi | Jonki BO | 📍 847225 | Basopatti | Branch Post Office |
| 1061 | Sirampur | Rahika SO | 📍 847238 | Madhubani | Post Office - PO |
| 1062 | Siriapur | Siriapur BO | 📍 847230 | Basopatti | Branch Post Office |
| 1063 | Sirkharia | Tulapatganj SO | 📍 847109 | Lakhnaur | Post Office - PO |
| 1064 | Sisauni | Basopatti SO | 📍 847225 | Harlakhi | Post Office - PO |
| 1065 | Sisauni | Bathnaha BO | 📍 847227 | Phulparas | Branch Post Office |
| 1066 | Sisauni | Mahrail BO | 📍 847404 | Andhratharhi | Branch Post Office |
| 1067 | Siswar | Khutauna SO | 📍 847227 | Laukaha | Post Office - PO |
| 1068 | Siswar | Siswabarhi BO | 📍 847409 | Phulparas | Branch Post Office |
| 1069 | Siswar | Siswabazar BO | 📍 847409 | Phulparas | Branch Post Office |
| 1070 | Siwa | Ganauli BO | 📍 847401 | Andhratharhi | Branch Post Office |
| 1071 | Siwaisinghpur | Kachhua BO | 📍 847410 | Lakhnaur | Branch Post Office |
| 1072 | Sobrauli | Uttra BO | 📍 847308 | Madhwapur | Branch Post Office |
| 1073 | Sohans | Kerwar BO | 📍 847222 | Bisfi | Branch Post Office |
| 1074 | Sohpur | Parsa BO | 📍 847109 | Jhanjharpur | Branch Post Office |
| 1075 | Sohrai | Rataul BO | 📍 847403 | Lakhnaur | Branch Post Office |
| 1076 | Sohraul | Sohroul BO | 📍 847223 | Benipatti | Branch Post Office |
| 1077 | Sonai | Sonai BO | 📍 847308 | Harlakhi | Branch Post Office |
| 1078 | Sonarpatti | Lakhnour BO | 📍 847403 | Lakhnaur | Branch Post Office |
| 1079 | Sonaur | Gandhwair BO | 📍 847234 | Madhubani | Branch Post Office |
| 1080 | Sonbarsa | Karhari BO | 📍 847108 | Laukahi | Branch Post Office |
| 1081 | Sonbarsa | Bath BO | 📍 847408 | Lakhnaur | Branch Post Office |
| 1082 | Sonhauli | Basaith Chandpura SO | 📍 847102 | Benipatti | Post Office - PO |
| 1083 | Sonmati | Khozpur BO | 📍 847224 | Babubarhi | Branch Post Office |
| 1084 | Sonpatahi | Sanpatahi BO | 📍 847401 | Babubarhi | Branch Post Office |
| 1085 | Sonre | Sonre BO | 📍 847410 | Lakhnaur | Branch Post Office |
| 1086 | Sonwari | Bhariabishanpur BO | 📍 847235 | Rajnagar | Branch Post Office |
| 1087 | Sothgaon | Sothgaon BO | 📍 847240 | Harlakhi | Branch Post Office |
| 1088 | Srichand | Nazirpur BO | 📍 847215 | Madhubani | Branch Post Office |
| 1089 | Sripur Hati | Sirpurhati BO | 📍 847212 | Pandaul | Branch Post Office |
| 1090 | Subhankarpur | Shubhankarpur BO | 📍 847213 | Kaluahi | Branch Post Office |
| 1091 | Sudai Ratauli | Sudairatauli BO | 📍 847402 | Ghoghardiha | Branch Post Office |
| 1092 | Sugapatti | Sugapatti BO | 📍 847409 | Phulparas | Branch Post Office |
| 1093 | Sugauna | Sugauna BO | 📍 847235 | Rajnagar | Branch Post Office |
| 1094 | Suhpur | Bishoul BO | 📍 847240 | Harlakhi | Branch Post Office |
| 1095 | Sujatpur | Sujatpur BO | 📍 843319 | Madhwapur | Branch Post Office |
| 1096 | Sujaul | Mailam BO | 📍 847235 | Andhratharhi | Branch Post Office |
| 1097 | Sukhbasi | Hisardeorhi BO | 📍 847230 | Harlakhi | Branch Post Office |
| 1098 | Sukhet | Sukhet BO | 📍 847404 | Jhanjharpur | Branch Post Office |
| 1099 | Suki | Maina Sukki BO | 📍 847228 | Khajauli | Branch Post Office |
| 1100 | Sundar Birajit | Sunder Virajit BO | 📍 847408 | Madhepur | Branch Post Office |