Karasu, Kara-su, Kara su, Qarasu or Gharasu (lit. 'black water/river' in Turkic languages) may refer to:
Rivers
The Balkans
A former name of the Struma River (Struma Karasu) in Bulgaria and Thrace, northern Greece A former name of the Mesta River (Mesta Karasu) in Bulgaria and northern Greece, forming the border between Greek Macedonia and Thrace A former name of the Haliacmon (İnce Karasu) in western Macedonia, northern Greece Karasu (Istanbul), a river in the greater Istanbul area of Turkey
Central Asia
Qarasu River, a small river in northeast Iran feeding into the southeast corner of the Caspian Sea Kara-Suu (Aksy), a right tributary of the river Naryn in Aksy District, Kyrgyzstan Kara-Suu (Kara-Köl), a left tributary of the river Naryn near Kara-Köl, Kyrgyzstan Karasu, name of the last stretch of river Shiderti, Kazakhstan Karasu (Koybagar), a river in the Kostanay Region, Kazakhstan Karasu (Urkash), a river in the Kostanay Region, Kazakhstan
Japan
Karasu River (Gunma) in Gunma Prefecture, Japan
Turkey
Karasu (Euphrates), the western of the two major sources of the Euphrates in Eastern Anatolia Karasu (Hatay), a tributary of the Orontes River (formerly of Lake Amik) in Hatay Province, southeastern Turkey, bordering Syria A small river in northwest Anatolia, a tributary of the Sakarya River
Town and villages
Azerbaijan
Qarasu, Hajigabul
Qarasu, Kurdamir
Qarasu, Qabala
Karasu Kumlakh or Qarasuqumlaq, Agdash Rayon
China
Karasu, Xinjiang, a place at the foot of the Kulma Pass
Crimea
Karasubazar
Japan
Karasu, Mie
Kazakhstan
Karasu District, Kostanay Region
Karasu (village), administrative center of Karasu District
Kyrgyzstan
several places, see Kara-Suu (disambiguation)
Tajikistan
Karasu, Tajikistan, Vahdat District
Turkey
Karasu, Sakarya, a town in Sakarya Province
Karasu, Karacabey, a village in Bursa Province
Karasu, Yenice, a village in Çanakkale Province
Karasu, Refahiye, a village in Erzincan Province
Karasu, Aşkale, a mahalle in Erzurum Province
Karasu, Karayazı, a mahalle in Erzurum Province
Uzbekistan
Karasu or Qorasuv, Andijan Province, adjacent to Kara-Suu, Kyrgyzstan
Fictional characters
Karasu, a character from the manga and anime series Yu Yu Hakusho
Karasu, a Noein character
Karasu, a ninja puppet in Naruto
Other uses
Karasu, an album in the 13 Japanese Birds series by Merzbow
Karasu Bay, a fictional bay in the air combat video game The Sky Crawlers: Innocent Aces Karasu relief, a rock relief in Turkey, near where the Karasu River, the western branch of the Euphrates, joins the eastern branch of the Euphrates Karasu, a species of giant beaked whale
People with the surname
Carasso family, a Sephardic Jewish family of Salonika, often spelled Karasu
Emmanuel Carasso (1862–1934), lawyer and politician
Isaac Carasso (1874–1939), Emanuel's nephew, founder of Groupe Danone
Daniel Carasso, Isaac's son, co-founder of Dannon in the U.S. Albert Karasu, Jewish-Turkish journalist Bilge Karasu (1930–1995), Turkish writer Oğuzhan Karasu (born 1995), Turkish volleyball player