| # | Village / Locality | Post Office | PIN Code | Sub District | Type |
|---|---|---|---|---|---|
| 351 | Kayar | Kayar BO | 📍 603110 | Chengalpattu | Branch Post Office |
| 352 | Kayar RF | Kayar BO | 📍 603110 | Chengalpattu | Branch Post Office |
| 353 | Kayarambedu | Kayarambedu; BO | 📍 603202 | Chengalpattu | Branch Post Office |
| 354 | Keelakalani | Kavanur BO | 📍 603203 | Sriperumbudur | Branch Post Office |
| 355 | Keelavalam | Keelavalam BO | 📍 603303 | Maduranthakam | Branch Post Office |
| 356 | Keelavedu | Meleripakkam BO | 📍 603003 | Tirukalukundram | Branch Post Office |
| 357 | Keelmaruvathur | Melmaruvathur SO | 📍 603319 | Cheyyur | Post Office - PO |
| 358 | Keeranallur | Kandoor B.O | 📍 602108 | Sriperumbudur | Branch Post Office |
| 359 | Keerapakkam | Desumugipettai BO | 📍 603109 | Tirukalukundram | Branch Post Office |
| 360 | Keerappakkam | Nallambakkam BO | 📍 600127 | Chengalpattu | Branch Post Office |
| 361 | Keezhamur | Padiri BO | 📍 603201 | Maduranthakam | Branch Post Office |
| 362 | Kelambakkam | Kelambakkam SO | 📍 603103 | Chengalpattu | Post Office - PO |
| 363 | Kesavarayanpettai | Melmaruvathur SO | 📍 603319 | Cheyyur | Post Office - PO |
| 364 | Kilakkadi | Kilakadi BO | 📍 603107 | Uthiramerur | Branch Post Office |
| 365 | Kilambi | Balchettychatram S.O | 📍 631551 | Kancheepuram | Post Office - PO |
| 366 | Kilambi | Krishnapuram B.O | 📍 631551 | Kancheepuram | Branch Post Office |
| 367 | Kilapakkam | Pandur BO | 📍 603109 | Tirukalukundram | Branch Post Office |
| 368 | Kilar | Balchettychatram S.O | 📍 631551 | Kancheepuram | Post Office - PO |
| 369 | Kilar | Damal B.O | 📍 631551 | Kancheepuram | Branch Post Office |
| 370 | Kilarkollai | Kadalur BO | 📍 603305 | Cheyyur | Branch Post Office |
| 371 | Kilathivakkam | Minnal Sithamur BO | 📍 603307 | Maduranthakam | Branch Post Office |
| 372 | Kiliyanagar | Kiliyanagar B.O | 📍 603406 | Maduranthakam | Branch Post Office |
| 373 | Kilkadirpoor | Melkadirpur B.O | 📍 631502 | Kancheepuram | Branch Post Office |
| 374 | Kilottivakkam | Thimmarajampettai B.O | 📍 631601 | Kancheepuram | Branch Post Office |
| 375 | Kiloy | Vayalur B.O | 📍 602105 | Sriperumbudur | Branch Post Office |
| 376 | Kilpattu | Veeranakunnam BO | 📍 603306 | Maduranthakam | Branch Post Office |
| 377 | Kilputhur | Asoor B.O | 📍 631605 | Kancheepuram | Branch Post Office |
| 378 | Kilvasalai | Neerpair BO | 📍 603313 | Maduranthakam | Branch Post Office |
| 379 | Kinar | Kinar Kandigai Pudur BO | 📍 603303 | Maduranthakam | Branch Post Office |
| 380 | Kinar | Kinar BO | 📍 603303 | Maduranthakam | Branch Post Office |
| 381 | Kizhur | Nellikuppam BO | 📍 603108 | Chengalpattu | Branch Post Office |
| 382 | Kodamanallur | Melmaduramangalam B.O | 📍 631553 | Sriperumbudur | Branch Post Office |
| 383 | Kodangacheri | Gunduperumbedu B.O | 📍 602105 | Sriperumbudur | Branch Post Office |
| 384 | Kodapattinam | Kuvathur SO | 📍 603305 | Cheyyur | Post Office - PO |
| 385 | Kodur | Kodoovur BO | 📍 603305 | Cheyyur | Branch Post Office |
| 386 | Koilambakkam | Kovilambakkam SO | 📍 600129 | Tambaram | Post Office - PO |
| 387 | Kokilamedu | Kokilamedu BO | 📍 603104 | Tirukalukundram | Branch Post Office |
| 388 | Kokkaranthangal | Palaiyur BO | 📍 603302 | Cheyyur | Branch Post Office |
| 389 | kolampakkam | Kolampakkam BO | 📍 603308 | Maduranthakam | Branch Post Office |
| 390 | Kolapakkam | Kolapakkam BO | 📍 600127 | Chengalpattu | Branch Post Office |
| 391 | Kolapakkam | Gerugambakkam BO | 📍 600128 | Sriperumbudur | Branch Post Office |
| 392 | Kolathur | Kolathur BO | 📍 600127 | Chengalpattu | Branch Post Office |
| 393 | Kolathur | Pillaipakkam B.O | 📍 602105 | Sriperumbudur | Branch Post Office |
| 394 | Kolathur | Nelvoy BO | 📍 603107 | Maduranthakam | Branch Post Office |
| 395 | Kolathur | Venkatapuram BO | 📍 603204 | Chengalpattu | Branch Post Office |
| 396 | Kolathur | Kolathur BO | 📍 603304 | Cheyyur | Branch Post Office |
| 397 | Kolathur | Paiyambadi BO | 📍 603309 | Maduranthakam | Branch Post Office |
| 398 | Kolathur | Asoor B.O | 📍 631605 | Kancheepuram | Branch Post Office |
| 399 | Kolathur RF | Venkatapuram BO | 📍 603204 | Chengalpattu | Branch Post Office |
| 400 | Kolathuvancheri | Paraniputhur BO | 📍 600122 | Sriperumbudur | Branch Post Office |