| Name | Country | Feature class | Latitude | Longitude | |
|---|---|---|---|---|---|
351  | Barata Barata,Mechka,Барата,Мечка | Bulgaria, Pleven | stream | N 43° 35′ 32'' | E 24° 54′ 3'' |
| 352 | Mechka Mechka,Ryeka Domus,Мечка | Bulgaria, Plovdiv | stream | N 42° 7′ 0'' | E 25° 17′ 0'' |
| 353 | Martinka Martinka,Reka Chanleyka,Мартинка | Bulgaria, Haskovo | stream | N 42° 2′ 0'' | E 25° 42′ 0'' |
| 354 | Mareshnitsa Mareshnica,Mareshnicka Reka,Mareshnitsa,Mareshnitsa Reka,Марешница,Марешницка Река | Bulgaria, Haskovo | stream | N 41° 37′ 9'' | E 25° 59′ 3'' |
| 355 | Marash Kumruja,Marash,Reka Kumrudzha,Мараш | Bulgaria, Yambol | stream | N 42° 33′ 0'' | E 26° 43′ 0'' |
| 356 | Manastirsko Dere Manastirsko Dere,Manastirskoto Dere,Манастирско Дере | Bulgaria, Plovdiv | stream | N 42° 2′ 0'' | E 25° 0′ 0'' |
| 357 | Manastirska Reka Manastirska,Manastirska Reka,Manastirska reka,Манастирска река | Bulgaria, Kyustendil | section of stream | N 42° 6′ 0'' | E 23° 18′ 0'' |
| 358 | Manastirska Reka Imarepdere,Manastirska,Manastirska Reka,Манастирска Река | Bulgaria, Smolyan | section of stream | N 41° 50′ 0'' | E 24° 44′ 0'' |
| 359 | Yazovir Malko Sharkovo Jazovir Malko Sharkovo,Yazovir Malco Sharkovo,Yazovir Malko Sharkovo,Язовир Малко Шарково | Bulgaria, Yambol | reservoir(s) | N 42° 6′ 48'' | E 26° 52′ 21'' |
| 360 | Malka Arda Malka Arda,Mlka Arda,Ryeka Kyuchyuk Arda,Млка Арда | Bulgaria, Smolyan | stream | N 41° 37′ 0'' | E 25° 4′ 0'' |
| 361 | Makotsevska Reka Makocevska Reka,Makotsevska,Makotsevska Reka,Макоцевска Река | Bulgaria, Sofia | stream | N 42° 42′ 0'' | E 23° 44′ 0'' |
| 362 | Madanska Reka Madanska,Madanska Reka,Маданска Река | Bulgaria, Smolyan | stream | N 41° 32′ 0'' | E 24° 55′ 0'' |
| 363 | Lyavovska Reka Ljubovska reka,Lyavovska,Lyavovska Reka,Любовска река | Bulgaria, Smolyan | stream | N 41° 51′ 0'' | E 24° 27′ 0'' |
| 364 | Lopushtnitsa Lopushhnica,Lopushhnica Dere,Lopushtnitsa,Lopustnitsa Dere,Lopuştnitsa Dere,Лопущница,Лопущница Дере | Bulgaria, Burgas | stream | N 41° 59′ 49'' | E 27° 49′ 40'' |
| 365 | Lopuha Lopuha,Lopukha,Лопуха | Bulgaria, Smolyan | stream | N 41° 45′ 0'' | E 24° 42′ 0'' |
| 366 | Lomya Lome,Lomja,Lomya,Ryeka Lom,Ломя | Bulgaria, Pleven | stream | N 43° 23′ 0'' | E 25° 10′ 0'' |
| 367 | Reka Liteyska Liteyska Reka,Reka Litejska,Reka Liteyska,litejska Reka,Река Литейска,литейска Река | Bulgaria, Burgas | stream | N 42° 13′ 19'' | E 27° 39′ 27'' |
| 368 | Lisiyska Reka Lisijska Reka,Lisiyska,Lisiyska Reka,Лисийска Река | Bulgaria, Blagoevgrad | stream | N 42° 1′ 28'' | E 23° 2′ 53'' |
| 369 | Lilkovska Reka Darmushevska,Likovska reka,Lilkovska Reka,Vuzreka,Ликовска река | Bulgaria, Plovdiv | stream | N 42° 1′ 0'' | E 24° 35′ 0'' |
| 370 | Levi Iskar Levi Iskar,Levi Iskur,Levi Iskŭr,Леви Искър | Bulgaria, Sofia | stream | N 42° 17′ 0'' | E 23° 31′ 0'' |
| 371 | Leshtinska Reka Leshhanska Reka,Leshhinska Reka,Leshtanska Reka,Leshtinska Reka,Лещанска Река,Лещинска Река | Bulgaria, Blagoevgrad | stream | N 41° 56′ 13'' | E 22° 59′ 47'' |
| 372 | Lepenitsa Bezhanitsa,Lepenica,Lepenitsa,Лепеница | Bulgaria, Pazardzhik | stream | N 41° 59′ 0'' | E 23° 57′ 0'' |
| 373 | Lefshenska Reka Lefshenska,Lefshenska Reka,Лефшенска Река | Bulgaria, Haskovo | stream | N 41° 43′ 18'' | E 26° 15′ 23'' |
| 374 | Lakhna Lakanathes Bay,Lakhna,Лахна | Bulgaria, Burgas | bay | N 42° 33′ 0'' | E 27° 35′ 0'' |
| 375 | Lakavitsa Lakavica,Lakavitsa,Lakavitsi,Praveshka Lakavitsa,Лакавица | Bulgaria, Sofia | stream | N 42° 55′ 0'' | E 23° 59′ 0'' |
| 376 | Lafinski Kamani Lafinski Kamani,Lafinski Kamuni,Lafinski Kamŭni,Лафински Камъни | Bulgaria, Burgas | shoal(s) | N 42° 8′ 54'' | E 27° 53′ 10'' |
| 377 | Kutlidzhikska Reka Kutlidzhikska,Kutlidzhikska Reka,Кутлиджикска Река | Bulgaria, Haskovo | stream | N 41° 39′ 0'' | E 25° 48′ 0'' |
| 378 | Kurudzha Dere Kurudzha Dere,Muradanli,Reka Muradanli,Куруджа Дере | Bulgaria, Yambol | stream | N 42° 8′ 0'' | E 26° 36′ 0'' |
| 379 | Kurudzha Dere Kurudzha Dere,Kurudzhadere,Куруджа Дере | Bulgaria, Smolyan | stream | N 41° 22′ 17'' | E 25° 8′ 28'' |
| 380 | Kurucha Kurucha,Reka Kurucha,Куруча | Bulgaria, Sliven | stream | N 42° 35′ 0'' | E 26° 19′ 0'' |
| 381 | Kardzhali Kardzhali,Kurdzhali,Kŭrdzhali,Кърджали | Bulgaria, Kardzhali | reservoir(s) | N 41° 36′ 0'' | E 25° 19′ 0'' |
| 382 | Krivodatin Dudenska Reka,Krivodatin,Krivodatino,Криводатин | Bulgaria, Burgas | stream | N 42° 15′ 0'' | E 27° 36′ 0'' |
| 383 | Kriva Reka Kriva,Kriva Reka,Крива Река | Bulgaria, Sofia-Capital | stream | N 42° 48′ 0'' | E 23° 15′ 0'' |
| 384 | Krichim Krichim,Krichimska,Kritschim,Кричим | Bulgaria, Smolyan | stream | N 41° 44′ 15'' | E 24° 25′ 7'' |
| 385 | Kotya Kot'ya,Kotja,Kotya,Kot’ya,Котя | Bulgaria, Haskovo | stream | N 41° 50′ 0'' | E 26° 6′ 0'' |
| 386 | Kotlenska Reka Kotlenska Reka,Kotlenska reka,Kotleshnitsa,Котленска река | Bulgaria, Sliven | stream | N 42° 48′ 0'' | E 26° 32′ 0'' |
| 387 | Kostilkovoska Reka Kostikovoska reka,Kostilkovoska Reka,Костиковоска река,Костилковоска Река | Bulgaria, Haskovo | stream | N 41° 23′ 39'' | E 26° 7′ 42'' |
| 388 | Kostelska Reka Kostelka,Kostelska Reka,Kostelska reka,Maryanska Reka,Костелска река | Bulgaria, Veliko Tarnovo | stream | N 42° 55′ 0'' | E 25° 58′ 0'' |
| 389 | Koprivska Reka Koprivska,Koprivska Reka,Koprivska reka,Копривска река | Bulgaria, Plovdiv | stream | N 41° 58′ 0'' | E 24° 43′ 0'' |
| 390 | Kopriven Kopriven,Koprivlen,Копривен | Bulgaria, Kyustendil | stream | N 42° 6′ 48'' | E 23° 2′ 1'' |
| 391 | Konska Reka Konska,Konska Reka,Конска Река | Bulgaria, Pernik | stream | N 42° 35′ 59'' | E 22° 56′ 44'' |
| 392 | Kelendzhika Kelendzhika,Kolendzhika,Келенджика,Коленджика | Bulgaria, Haskovo | stream | N 41° 46′ 45'' | E 26° 15′ 6'' |
| 393 | Kodzha Dere Kodzha Dere,Kodzhadere,Коджа Дере | Bulgaria, Kardzhali | stream | N 41° 26′ 12'' | E 25° 35′ 21'' |
| 394 | Kochoolu Dere Kochoolo dere,Kochoolu Dere,Kochoolú Deré,Кочооло дере,Кочоолу Дере | Bulgaria, Smolyan | stream | N 41° 40′ 32'' | E 24° 12′ 8'' |
| 395 | Kobilska Kobilska,Kobilska Reka,Кобилска,Кобилска Река | Bulgaria, Kyustendil | stream | N 42° 33′ 38'' | E 22° 33′ 3'' |
| 396 | Harsovska Reka Harsovska Reka,Khursovska Reka,Khursovska reka,Khŭrsovska Reka,Хърсовска река | Bulgaria, Blagoevgrad | stream | N 42° 2′ 0'' | E 23° 8′ 0'' |
| 397 | Hambarliyska Hambarliyska,Khambarlijska,Khambarliyska,Хамбарлийска | Bulgaria, Yambol | stream | N 42° 9′ 0'' | E 26° 32′ 0'' |
| 398 | Hambardere Hambardere,Khambar,Khambardere,Хамбардере | Bulgaria, Smolyan | section of stream | N 41° 47′ 0'' | E 25° 1′ 0'' |
| 399 | Ketenliyska Reka Katenlijska reka,Ketenliyska,Ketenliyska Reka,Катенлийска река | Bulgaria, Haskovo | stream | N 41° 23′ 0'' | E 26° 0′ 0'' |
| 400 | Kesebir Kesebir,Kesibir,Кесебир,Кесибир | Bulgaria, Kardzhali | stream | N 41° 25′ 25'' | E 25° 39′ 15'' |
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