| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 251 | Kanjili kottai | Nagamangalam BO | 📍 621701 | Ariyalur | Branch Post Office |
| 252 | Kankeyan kurichi | Pilichikuli BO | 📍 621804 | Udayarpalayam | Branch Post Office |
| 253 | Karaikattukurichi | Naduvalur BO | 📍 612904 | Udayarpalayam | Branch Post Office |
| 254 | Karaikurichi | Thathampettai Palur SO | 📍 612904 | Udayarpalayam | Post Office - PO |
| 255 | Karaimedu | Kaluvanthondi BO | 📍 621802 | Udayarpalayam | Branch Post Office |
| 256 | Karaimedu | Sengunthapuram BO | 📍 621802 | Udayarpalayam | Branch Post Office |
| 257 | Karaimedu | Pudukudi BO | 📍 621806 | Udayarpalayam | Branch Post Office |
| 258 | karaipakkam | Manjamedu Karaipakkam BO | 📍 621715 | Ariyalur | Branch Post Office |
| 259 | Karaiyavetti | Kilakavattankurichi BO | 📍 621715 | Ariyalur | Branch Post Office |
| 260 | Karimedu | Devanur BO | 📍 621806 | Udayarpalayam | Branch Post Office |
| 261 | Kariyamkurichi | Elakurichi BO | 📍 621715 | Ariyalur | Branch Post Office |
| 262 | Karuppilakattalai | Karuppilakattalai BO | 📍 621707 | Ariyalur | Branch Post Office |
| 263 | Karuppur Senapathy | Karuppur Senapathy BO | 📍 621707 | Ariyalur | Branch Post Office |
| 264 | Karuvalkadu | Arungal BO | 📍 621707 | Ariyalur | Branch Post Office |
| 265 | kasampallam | Udayarpalayam SO Ariyalur | 📍 621804 | Udayarpalayam | Post Office - PO |
| 266 | kasankottai | Kasankottai BO | 📍 621701 | Udayarpalayam | Branch Post Office |
| 267 | Kathankudikadu | Telur BO | 📍 621704 | Ariyalur | Branch Post Office |
| 268 | Kattagaram North | Minsuritti SO | 📍 612903 | Udayarpalayam | Post Office - PO |
| 269 | Kattagaram South | Kattagaram BO | 📍 612903 | Udayarpalayam | Branch Post Office |
| 270 | Kattathur | Kattathur BO | 📍 621803 | Udayarpalayam | Branch Post Office |
| 271 | Kattathur North | Kallathur Thandalai SO | 📍 621803 | Udayarpalayam | Post Office - PO |
| 272 | Kattathur South | Kallathur Thandalai SO | 📍 621803 | Udayarpalayam | Post Office - PO |
| 273 | Kattayan kudikadu | Pottaveli BO | 📍 621718 | Ariyalur | Branch Post Office |
| 274 | Kattu kollai | Muthuservaimadam BO | 📍 612903 | Udayarpalayam | Branch Post Office |
| 275 | Kattuppringam | Hasthinapuram BO | 📍 621704 | Ariyalur | Branch Post Office |
| 276 | Kavanur | Kavanur BO | 📍 621704 | Ariyalur | Branch Post Office |
| 277 | Kaveripalayam | Sennivanam BO | 📍 621718 | Ariyalur | Branch Post Office |
| 278 | Kayarlabath | Lingathadimedu BO | 📍 621705 | Ariyalur | Branch Post Office |
| 279 | Keela kuvagam | Kuvagam BO | 📍 621710 | Udayarpalayam | Branch Post Office |
| 280 | Keelaiyur | Kilaiyur BO | 📍 621707 | Ariyalur | Branch Post Office |
| 281 | Keelakkadu | Pichanur BO | 📍 612901 | Udayarpalayam | Branch Post Office |
| 282 | Keelakolathur | Kilakolathur BO | 📍 621715 | Ariyalur | Branch Post Office |
| 283 | Keelakudikadu | Thengachiperumalnatham BO | 📍 612904 | Udayarpalayam | Branch Post Office |
| 284 | Keelakudiyiruppu | Kilakudiyiruppu BO | 📍 621802 | Udayarpalayam | Branch Post Office |
| 285 | Keelanatham | Ambapur SO | 📍 621701 | Udayarpalayam | Post Office - PO |
| 286 | Keelappatti | Marudur BO | 📍 621710 | Udayarpalayam | Branch Post Office |
| 287 | Keelappatti | Sirukalathur BO | 📍 621710 | Sendurai | Branch Post Office |
| 288 | Keelaramanallur | Kuruvadi BO | 📍 621715 | Ariyalur | Branch Post Office |
| 289 | Keelavarappankurichi | Alagiamanavalam BO | 📍 621715 | Ariyalur | Branch Post Office |
| 290 | Keezha vallam | Rangiam BO | 📍 608901 | Udayarpalayam | Branch Post Office |
| 291 | Keezhakavattankurichi | Kilakavattankurichi BO | 📍 621715 | Ariyalur | Branch Post Office |
| 292 | Keezhamaligai | Kilamaligai BO | 📍 621710 | Sendurai | Branch Post Office |
| 293 | Keezhapalur | Kilapaluvur SO | 📍 621707 | Ariyalur | Post Office - PO |
| 294 | Kilaesanai | Karuppilakattalai BO | 📍 621707 | Ariyalur | Branch Post Office |
| 295 | Kilaiyur | Kilaiyur BO | 📍 621707 | Ariyalur | Branch Post Office |
| 296 | Kilakankiyanur | Sundakudi BO | 📍 621701 | Udayarpalayam | Branch Post Office |
| 297 | Kilaneduvai | Kilaneduvoi BO | 📍 621805 | Udayarpalayam | Branch Post Office |
| 298 | Kilavaanam | Karuppilakattalai BO | 📍 621707 | Ariyalur | Branch Post Office |
| 299 | Kilimangalam | Ayanathur BO | 📍 621705 | Ariyalur | Branch Post Office |
| 300 | Kilimangalam | Palayakudi BO | 📍 621804 | Sendurai | Branch Post Office |