| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 401 | Marakurichi | Asaveerankudikadu SO | 📍 621719 | Sendurai | Post Office - PO |
| 402 | Maraunur | Inamattur BO | 📍 621704 | Ariyalur | Branch Post Office |
| 403 | Marudur | Marudur BO | 📍 621710 | Udayarpalayam | Branch Post Office |
| 404 | Marukalankurichi | Z.Melur BO | 📍 621803 | Udayarpalayam | Branch Post Office |
| 405 | Maruvathur | Maruvathur BO | 📍 621710 | Sendurai | Branch Post Office |
| 406 | Mathiyanur | Alagiamanavalam BO | 📍 621715 | Ariyalur | Branch Post Office |
| 407 | Mathumadakki | Kilamaligai BO | 📍 621710 | Sendurai | Branch Post Office |
| 408 | Mathur | Kamarasavalli BO | 📍 621715 | Ariyalur | Branch Post Office |
| 409 | Mattu kuppam | Varadarajampettai SO | 📍 621805 | Udayarpalayam | Post Office - PO |
| 410 | Mayilandakottai | Reddipalayam BO | 📍 621704 | Ariyalur | Post Office - PO |
| 411 | Mela mathanathur | Vazhaikurichi BO | 📍 612904 | Udayarpalayam | Branch Post Office |
| 412 | Mela michael patti | Nayanganaipiriyal BO | 📍 621804 | Udayarpalayam | Branch Post Office |
| 413 | Mela vallam | Rangiam BO | 📍 608901 | Udayarpalayam | Branch Post Office |
| 414 | Melakankiyanur | Sundakudi BO | 📍 621701 | Udayarpalayam | Branch Post Office |
| 415 | Melakudikadu | Thengachiperumalnatham BO | 📍 612904 | Udayarpalayam | Branch Post Office |
| 416 | Melakudiyuruppu | Karadikulam BO | 📍 621802 | Udayarpalayam | Branch Post Office |
| 417 | Melaneduvai | Pattanamkurichi BO | 📍 621801 | Udayarpalayam | Branch Post Office |
| 418 | Melapalur | Kilaiyur BO | 📍 621707 | Ariyalur | Branch Post Office |
| 419 | Melapalur | Kilapaluvur SO | 📍 621707 | Ariyalur | Post Office - PO |
| 420 | Melapatti | Sirukalathur BO | 📍 621710 | Sendurai | Branch Post Office |
| 421 | Melapattu | Silambur BO | 📍 608901 | Udayarpalayam | Branch Post Office |
| 422 | Melaramanallur | Alagiamanavalam BO | 📍 621715 | Ariyalur | Branch Post Office |
| 423 | Melatheru | Kandirathitham BO | 📍 621851 | Ariyalur | Branch Post Office |
| 424 | Melavannam | Kilapaluvur SO | 📍 621707 | Ariyalur | Post Office - PO |
| 425 | Melavarappankurichi | Alagiamanavalam BO | 📍 621715 | Ariyalur | Branch Post Office |
| 426 | Melur | Z.Melur BO | 📍 621803 | Udayarpalayam | Branch Post Office |
| 427 | Melur Devanur RF | Tattanur BO | 📍 621804 | Udayarpalayam | Branch Post Office |
| 428 | Mettu krishnapuram | Subbarayapuram BO | 📍 621704 | Ariyalur | Branch Post Office |
| 429 | Mettu krishnapuram | Karuppur Senapathy BO | 📍 621707 | Ariyalur | Branch Post Office |
| 430 | Mettukudisai | Srinivasapuram BO | 📍 621705 | Ariyalur | Branch Post Office |
| 431 | Mettupalayam | Gangaikondacholapuram SO | 📍 612901 | Udayarpalayam | Post Office - PO |
| 432 | Mettupalayam | Sennivanam BO | 📍 621718 | Ariyalur | Branch Post Office |
| 433 | Mettupalayam colony | Sennivanam BO | 📍 621718 | Ariyalur | Branch Post Office |
| 434 | MGR nagar | Ariyalur Ariyalur SO | 📍 621704 | Ariyalur | Post Office - PO |
| 435 | MGR nagar | Kallankurichi SO | 📍 621705 | Ariyalur | Post Office - PO |
| 436 | Morakkuzhi | Srinivasapuram BO | 📍 621705 | Ariyalur | Branch Post Office |
| 437 | MR Kalvi nagar | Tattanur BO | 📍 621804 | Udayarpalayam | Branch Post Office |
| 438 | Mudikondan | Tirumanur SO | 📍 621715 | Ariyalur | Post Office - PO |
| 439 | Mudukulam R F | Adhanakurichi BO | 📍 621719 | Udayarpalayam | Branch Post Office |
| 440 | Mukkulam | Muthuservaimadam BO | 📍 612903 | Udayarpalayam | Branch Post Office |
| 441 | Mullaiyur | Dalavoy BO | 📍 621730 | Ariyalur | Branch Post Office |
| 442 | Mullukurichi | Adhanakurichi BO | 📍 621719 | Sendurai | Branch Post Office |
| 443 | Muniathirayanpatti | Udayarpalayam SO Ariyalur | 📍 621804 | Udayarpalayam | Post Office - PO |
| 444 | Muniyan kurichi | Periyattirukonam BO | 📍 621701 | Udayarpalayam | Branch Post Office |
| 445 | Murthiyan | Nayanganaipiriyal BO | 📍 621804 | Udayarpalayam | Branch Post Office |
| 446 | Murugan kottai | Kalleri BO | 📍 621803 | Udayarpalayam | Branch Post Office |
| 447 | Muthu kulam | Vizhapallam BO | 📍 621803 | Udayarpalayam | Branch Post Office |
| 448 | Muthu nagar | Elangaicheri BO | 📍 621714 | Sendurai | Branch Post Office |
| 449 | Muthu vinagarkuppam | Tirukalappur BO | 📍 621805 | Udayarpalayam | Branch Post Office |
| 450 | Muthuservaimadam | Muthuservaimadam BO | 📍 612903 | Udayarpalayam | Branch Post Office |