| Name | Country | Feature class | Latitude | Longitude | |
|---|---|---|---|---|---|
301  | Banderitsa Banderitsa,Bunderica,Bunderitsa,Bŭnderitsa,Бъндерица | Bulgaria, Blagoevgrad | stream | N 41° 49′ 0'' | E 23° 29′ 0'' |
| 302 | Breznishka Reka Breznishka Reka,Breznishka reka,Tufcha,Брезнишка река | Bulgaria, Blagoevgrad | stream | N 41° 37′ 0'' | E 23° 45′ 0'' |
| 303 | Brestova Reka Brestova Reka,Brestova reka,Bryastova Reka,Брестова река | Bulgaria, Shumen | stream | N 43° 5′ 0'' | E 27° 3′ 0'' |
| 304 | Botunya Botunja,Botunya,Ботуня | Bulgaria, Montana | stream | N 43° 28′ 53'' | E 23° 21′ 13'' |
| 305 | Bogutevska Reka Bogutevska,Bogutevska Reka,Bogutevska reka,Богутевска река | Bulgaria, Smolyan | stream | N 41° 46′ 0'' | E 24° 42′ 0'' |
| 306 | Bobovdolska Reka Bobovdolska,Bobovdolska Reka,Bobovdolska reka,Бобовдолска река | Bulgaria, Kyustendil | stream | N 42° 16′ 0'' | E 23° 2′ 0'' |
| 307 | Blond Banka Blond,Blond,Burgaska Banka,Блонд | Bulgaria, Burgas | shoal(s) | N 42° 31′ 0'' | E 27° 33′ 0'' |
| 308 | Blatovska Reka Blatovska Reka,Blatovska reka,Blatovskata,Блатовска река | Bulgaria, Smolyan | stream | N 41° 37′ 0'' | E 24° 55′ 0'' |
| 309 | Bistritsa Bistrica,Bistritsa,Бистрица | Bulgaria, Kyustendil | stream | N 42° 18′ 49'' | E 22° 45′ 42'' |
| 310 | Bistritsa Bistrica,Bistritsa,Bistriza,Бистрица | Bulgaria, Pazardzhik | stream | N 42° 3′ 0'' | E 24° 0′ 0'' |
| 311 | Bistritsa Bistrica,Bistritsa,Bistriza,Бистрица | Bulgaria, Blagoevgrad | stream | N 41° 30′ 0'' | E 23° 57′ 0'' |
| 312 | Bey Mahlenska Reka Bejmakhlenska reka,Bey Mahlenska Reka,Bey Makhlenska Reka,Беймахленска река | Bulgaria, Burgas | stream | N 42° 23′ 0'' | E 27° 12′ 0'' |
| 313 | Beloradska Reka Belodarska Reka,Beloradska Reka,Beloradska reka,Reka Byeloradska,Белодарска Река,Белорадска река | Bulgaria, Vidin | stream | N 44° 0′ 0'' | E 22° 49′ 0'' |
| 314 | Belishka Reka Belichka Reka,Belishka Reka,Belishka reka,Белишка река | Bulgaria, Blagoevgrad | stream | N 41° 56′ 0'' | E 23° 34′ 0'' |
| 315 | Beli Osŭm Beli Ossam,Beli Ossăm,Beli Osum,Ryeka Byeli Osem,Ryeka Byeli Osum,Ryeka Byeli Osŭm,Бели Осъм | Bulgaria, Lovech | stream | N 42° 52′ 48'' | E 24° 42′ 35'' |
| 316 | Beli Lom Beli Lom,Ryeka Ak Lom,Ryeka Byeli Lom,Бели Лом | Bulgaria, Ruse | stream | N 43° 41′ 1'' | E 26° 0′ 7'' |
| 317 | Beli Iskar Beli Iskar,Beli Iskur,Beli Iskŭr,Бели Искър | Bulgaria, Sofia | reservoir(s) | N 42° 8′ 0'' | E 23° 34′ 0'' |
| 318 | Belichka Reka Belichka,Belichka Reka,Belishka reka,Belitsa,Белишка река | Bulgaria, Sofia | stream | N 42° 49′ 0'' | E 23° 14′ 0'' |
| 319 | Belenska Reka Belenska Reka,Belenska reka,Reka Byelenska,Беленска река | Bulgaria, Vidin | stream | N 43° 45′ 0'' | E 22° 44′ 0'' |
| 320 | Bela Mesta Bela Mesta,Ryeka Byela Mesta,Бела Места | Bulgaria, Blagoevgrad | stream | N 42° 2′ 0'' | E 23° 43′ 0'' |
| 321 | Bekyurska Reka Bekjurska reka,Bekyurska,Bekyurska Reka,Бекюрска река | Bulgaria, Plovdiv | stream | N 41° 49′ 0'' | E 25° 1′ 0'' |
| 322 | Beglishka Reka Beglishka,Beglishka Reka,Беглишка Река | Bulgaria, Pazardzhik | stream | N 41° 48′ 21'' | E 24° 9′ 25'' |
| 323 | Bebrovska Bebrovska,Kamenitsa,Бебровска | Bulgaria, Veliko Tarnovo | stream | N 43° 2′ 0'' | E 25° 58′ 0'' |
| 324 | Bebresh Bebresh,Bebrezh,Reka Beorezh,Бебреш | Bulgaria, Sofia | stream | N 43° 1′ 0'' | E 23° 52′ 0'' |
| 325 | Barakliyska Reka Baraklijska reka,Barakliyska,Barakliyska Reka,Бараклийска река | Bulgaria, Lovech | stream | N 42° 47′ 0'' | E 24° 15′ 0'' |
| 326 | Barakliyska Reka Baraklijska Reka,Barakliyska Reka,Sachan Dere,Бараклийска Река | Bulgaria, Smolyan | stream | N 41° 47′ 36'' | E 24° 14′ 57'' |
| 327 | Prangiyska Reka Prangijska Reka,Prangiyska,Prangiyska Reka,Прангийска Река | Bulgaria, Sliven | stream | N 42° 55′ 0'' | E 26° 18′ 0'' |
| 328 | Popovska Reka Polovska Reka,Popovska Reka,Popowska Reka,Поповска Река | Bulgaria, Yambol | stream | N 42° 9′ 0'' | E 26° 33′ 0'' |
| 329 | Popovska Reka Popovska,Popovska Reka,Поповска Река | Bulgaria, Kardzhali | stream | N 41° 7′ 0'' | E 25° 55′ 0'' |
| 330 | Petvarska Reka Petvarska,Petvarska Reka,Петварска Река | Bulgaria, Smolyan | stream | N 41° 52′ 0'' | E 24° 25′ 0'' |
| 331 | Perperek Perperek,Perperska,Перперек | Bulgaria, Kardzhali | stream | N 41° 39′ 0'' | E 25° 32′ 0'' |
| 332 | Pepelashka Reka Pepelashka,Pepelashka Reka,Пепелашка Река | Bulgaria, Plovdiv | stream | N 42° 2′ 0'' | E 24° 38′ 0'' |
| 333 | Panairdere Panair Dere,Panairdere,Панаир Дере,Панаирдере | Bulgaria, Varna | stream | N 42° 50′ 15'' | E 27° 52′ 56'' |
| 334 | Yazovir Ovcharitsa Jazovir Ovcharica,Yazovir Ovchariia,Yazovir Ovcharitsa,Язовир Овчарица | Bulgaria, Sliven | reservoir(s) | N 42° 16′ 0'' | E 26° 10′ 0'' |
| 335 | Oryahovska Reka Orjakhovska Reka,Oryahovska Reka,Oryakhovska Reka,Оряховска Река | Bulgaria, Stara Zagora | stream | N 42° 17′ 0'' | E 25° 55′ 0'' |
| 336 | Oreshka Oreschka,Oreshka,Ryeka Oryeshka,Орешка | Bulgaria, Burgas | stream | N 42° 13′ 5'' | E 27° 44′ 53'' |
| 337 | Omurovska Reka Omurovska,Omurovska Reka,Омуровска Река | Bulgaria, | stream | N 42° 8′ 0'' | E 25° 14′ 0'' |
| 338 | Novoselska Reka Novoselska,Novoselska Reka,Новоселска Река | Bulgaria, Kyustendil | stream | N 42° 18′ 7'' | E 22° 46′ 4'' |
| 339 | Nesebarski Zaliv Nesebarski Zaliv,Neseburski Zaliv,Nesebŭrski Zaliv,Несебърски Залив | Bulgaria, Burgas | bay | N 42° 41′ 4'' | E 27° 43′ 45'' |
| 340 | Nechinska Bara Gagovitsa,Metschinska,Nechinska Bara,Нечинска Бара | Bulgaria, Montana | stream | N 43° 42′ 13'' | E 23° 5′ 53'' |
| 341 | Masharitsa Masharica,Masharitsa,Muzharica,Muzharitsa,Машарица,Мужарица | Bulgaria, Haskovo | stream | N 41° 34′ 45'' | E 26° 2′ 0'' |
| 342 | Matnitsa Matnitsa,Mutnica,Mutnitsa,Mŭtnitsa,Мътница | Bulgaria, Pazardzhik | stream | N 42° 2′ 29'' | E 24° 0′ 12'' |
| 343 | Matnitsa Matnitsa,Mutnica,Mutnitsa,Mŭtnitsa,Мътница | Bulgaria, Blagoevgrad | stream | N 41° 30′ 0'' | E 23° 53′ 0'' |
| 344 | Mustanova Reka Musachevska,Mustanova Reka,Mustanovata Reka,Мустанова Река | Bulgaria, Stara Zagora | stream | N 42° 11′ 0'' | E 25° 54′ 0'' |
| 345 | Musinski Izvor Musinski Izvor,Peshterata,Мусински Извор | Bulgaria, Veliko Tarnovo | spring(s) | N 43° 12′ 0'' | E 25° 22′ 0'' |
| 346 | Musalenski Ezera Ezera Stalinski,Musalenski Ezera,Мусаленски Езера | Bulgaria, Sofia | lakes | N 42° 12′ 0'' | E 23° 36′ 0'' |
| 347 | Maglizhka Maglizhka,Muglizhka,Mŭglizhka,Ryeka Maglizh,Мъглижка | Bulgaria, Stara Zagora | stream | N 42° 33′ 0'' | E 25° 34′ 0'' |
| 348 | Mlachka Reka Machka,Mlachka,Mlachka Reka,Млачка Река | Bulgaria, Kyustendil | stream | N 42° 7′ 2'' | E 22° 38′ 53'' |
| 349 | Mehmechkoyska Reka Mehmechkoyska Reka,Mekhmechkojska Reka,Mekhmechkovska Reka,Mekhmechkoyska Reka,Мехмечковска Река,Мех... | Bulgaria, Burgas | stream | N 42° 18′ 42'' | E 27° 37′ 18'' |
| 350 | Medovnishka Medovnichka,Medovnishka,Medownischka Reka,Медовничка,Медовнишка | Bulgaria, Vidin | stream | N 43° 41′ 8'' | E 22° 57′ 6'' |
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