List of tributaries of the Danube
This is a list of tributaries of the Danube by order of entrance.
The Danube is Europe's second-longest river. It starts in the Black Forest in Germany as two smaller rivers—the Brigach and the Breg—which join at Donaueschingen, and it is from here that it is known as the Danube, flowing generally eastwards for a distance of some, passing through several Central and Eastern European capitals, before emptying into the Black Sea via the Danube Delta in Romania.
The Danube flows through—or forms a part of the borders of—ten countries: Germany, Austria, Slovakia, Hungary, Croatia, Serbia, Bulgaria, Romania, Moldova, and Ukraine; in addition, the drainage basin includes parts of nine more countries: Poland, Switzerland, Italy, Czech Republic, Slovenia, Bosnia and Herzegovina, Montenegro, North Macedonia and Albania.
| River | Entering the Danube at | Distance from mouth | Side of the entrance | Length |
| Iller | Ulm | right | 147 | |
| Wörnitz | Donauwörth | left | 132 | |
| Zusam | Donauwörth | right | 6 | |
| Lech | Marxheim | right | 264 | |
| Paar | near Vohburg | right | 134 | |
| Abens | near Neustadt | right | ||
| Altmühl | Kelheim | 2414.68 | left | 23 |
| Hopfenbach | Kelheim | 2410.67 | right | |
| Schwarze Laber | Sinzing | 2387.9 | left | |
| Naab | Regensburg | 2385.3 | left | 165 |
| Regen | Regensburg | 2379.24 | left | 165 |
| Sulzbach | Donaustauf | 2367.5 | left | |
| Otterbach | Donaustauf | 2367.6 | left | |
| Pfatter | Pfatter | 2349.31 | right | |
| Wiesent | 2346.43 | left | ||
| Große Laber | near Straubing | 2329.51 | right | |
| Aiterach | Straubing | 2214.0 | right | |
| Kinsach | Bogen | 2213.39 | left | |
| Isar | near Deggendorf | 2281.71 | right | 286 |
| Hengersberger Ohe | Winzer | 2264.21 | left | |
| Angerbach | Hofkirchen | 2256.89 | right | - |
| Vils | Vilshofen | 2248.63 | right | |
| Gaißa | Passau-Schalding | 2233.85 | left | |
| Ilz | Passau | 2225.43 | left | |
| Inn | Passau | 2225.2 | right | 517 |
| Satzbach | Thyrnau | 2221.3 | left | |
| Kößlbach | Freinberg | 2218.0 | right | |
| Erlau | Erlau | 2215.15 | left | |
| Dandlbach | Neustift im Mühlkreis | 2201.77 | left | |
| Ranna | Niederranna | 2196.04 | left | |
| Kleiner Kösslbach | Niederranna | 2194.55 | right | |
| Kleine Mühl | Kirchberg ob der Donau | 2177.85 | left | |
| Große Mühl | Untermühl | 2168.0 | left | 70 |
| Innbach | Wilhering | right | 53 | |
| Rodl | Ottensheim | 2144.83 | left | |
| Bleicherbach | Ottensheim | 2143.35 | left | |
| Traun | near Linz | 2124.73 | right | 153 |
| Ipfbach | Asten | 2116.98 | right | |
| Gusen | Mauthausen | 2113.6 | left | |
| Enns | Mauthausen | 2111.828 | right | 254 |
| Aist | Naarn im Machlande | 2108.5 | left | |
| Ysper | Isperdorf | 2065.7 | right | |
| Ybbs | Ybbs an der Donau | 2057.1 | right | 13 |
| Erlauf | Pöchlarn | 2046.3 | left | 70 |
| Melk | Melk | right | ||
| Pielach | Melk | 2034.35 | right | 70 |
| Aggsbach | Aggsbach | 2027.17 | right | |
| Endlingbach | Aggsbach | 2026.97 | left | |
| Spitzer Bach | Spitz | 2019.58 | left | |
| Fladnitzbach | Palt | 2000.6 | right | |
| Krems | Altenwörth | left | 65 | |
| Traisen | Altenwörth | 1979.1 | right | |
| Kamp | Altenwörth | left | 168 | |
| Perschling | Zwentendorf | 1972.1 | right | |
| Große Tulln | Tulln an der Donau | 1965.27 | right | |
| Schmida | Korneuburg | left | 74 | |
| Wien | Vienna | right | ||
| Schwechat | Upstream of Schönau | 1913.7 | right | |
| Fischa | Fischamend | right | ||
| Rußbach | near Hainburg an der Donau | 1881.2 | left | 71 |
| Morava | Devín | 1880.26 | left | 358 |
| Vydrica | Bratislava | 1871.5 | left | |
| Leitha | near Mosonmagyaróvár | 1793.0 | right | 18 |
| Rába | Győr | 1793.0 | right | 322 |
| Concó | Ács | 1777.0 | right | |
| Váh | Komárno | 1765.8 | left | 403 |
| Hron | near Štúrovo | 1716.0 | left | 298 |
| Ipeľ | near Szob | 1708.2 | left | 232 |
| Lepence | Visegrád | 1697.0 | right | |
| Benta | Százhalombatta | 1621.75 | right | |
| Sió | near Szekszárd | 1497.15 | right | 121 |
| Drava | near Osijek | 1382.5 | right | 725 |
| Vuka | Vukovar | 1333.1 | right | 114 |
| Tisza | near Titel | 1214.5 | left | 965 |
| Sava | Belgrade | 1170 | right | 990 |
| Timiș | near Pančevo | 1154.2 | left | 359 |
| Jezava | Smederevo | 1115.2 | right | |
| Velika Morava | near Smederevo | 1104.5 | right | 185 |
| Mlava | near Kostolac | 1091.6 | right | 158 |
| Karaš | near Banatska Palanka | 1076.5 | left | 11 |
| Nera | near Banatska Palanka | 1075.0 | left | 143 |
| Belobreșca | left | 8 | ||
| Șușca | left | 7 | ||
| Pek | Veliko Gradište | 1057.1 | right | 129 |
| Radimna | left | 27 | ||
| Pojejena | left | 9 | ||
| Pârva | Upstream of Moldova Veche | 1050.9 | left | 8 |
| Boșneag | Moldova Veche | 1045.3 | left | 12 |
| Tumanska reka | Usije | right | ||
| Liborajdea | Liborajdea | 1031.9 | left | 8 |
| Čezava | near Dobra | 1026.8 | right | |
| Camenița | Gornea | 1025.7 | left | 14 |
| Orevița | Liubcova | 1022.9 | left | 25 |
| Dobranska reka | Dobra | 1021.0 | right | |
| Berzasca | Berzasca | 1017.8 | left | 46 |
| Kožica | near Dobra | right | ||
| Sirina | Downstream of Cozla | 1012.1 | left | 22 |
| Pesača | 1009.4 | right | ||
| Poloseva | 1007.3 | left | 8 | |
| Boljetinska reka | 1003.2 | right | ||
| Strenica | left | 7 | ||
| Zlatica | 992.8 | right | ||
| Porečka | Donji Milanovac | 988.2 | right | 5 |
| Lut | 988 | left | 8 | |
| Tișovița | near Eibenthal | 982.6 | left | 16 |
| Hlubotina | 979.7 | left | 8 | |
| Plavișevița | 976.2 | left | 9 | |
| Valea Morilor | left | 11 | ||
| Valea Satului | Dubova | left | 7 | |
| Mraconia | near Dubova | 967.0 | left | 19 |
| Valea Satului | Upstream of Eșelnița | left | 7 | |
| Mala | Upstream of Eșelnița | 961.4 | left | 12 |
| Eșelnița | Eșelnița | 959.7 | left | 26 |
| Cerna | Orșova | 953.2 | left | 79 |
| Bahna | near Ilovița | 949.8 | left | 35 |
| Dževrin | Novi Sip | 949.2 | right | |
| Vodița | near Ilovița | left | 9 | |
| Kašajna | Davidovac | 946.8 | right | |
| Jidoștița | Gura Văii | left | 19 | |
| Kladušnica | Kladušnica | 936.8 | right | |
| Topolnița | Drobeta-Turnu Severin | 927.8 | left | 44 |
| Băran | near Bistrița | left | 6 | |
| Vratna | Slatina | 879 | right | |
| Blahnița | Balta Verde | left | 56 | |
| Timok | Bulgarian-Serbian border | 845.65 | right | 203 |
| Drincea | Cetate | left | 79 | |
| Topolovets | near Vidin | 784.1 | right | 68 |
| Voynishka | Dunavtsi | 782.2 | right | 55 |
| Vidbol | Dunavtsi | 780.2 | right | 62 |
| Archar | Archar | 768.5 | right | 59 |
| Skomlya | near Dobri dol | 762.5 | right | 42 |
| Lom | Lom | 741.7 | right | 93 |
| Balasan | near Catane | left | 51 | |
| Desnățui | Bistreț | left | 115 | |
| Tsibritsa | Dolni Tsibar | 715.85 | right | 91 |
| Jiu | near Bechet | 691.55 | left | 339 |
| Ogosta | between the Jiu's mouth and Oryahovo | 684.5 | right | 143 |
| Jieț | Bechet | 681 | left | 52 |
| Iskar | Gigen | 637.0 | right | 352 |
| Ursa | Gârcov | left | 11 | |
| Vit | Somovit | 609.5 | right | 168 |
| Olt | Turnu Măgurele | 604.0 | left | 615 |
| Sâi | Turnu Măgurele | 600.6 | left | 85 |
| Osam | Nikopol, Bulgaria | 600.1 | right | 314 |
| Călmățui | Suhaia | left | 139 | |
| Pasărea | Zimnicea | left | 19 | |
| Vedea | Bujoru | left | 224 | |
| Yantra | Svishtov | 536.7 | right | 285 |
| Parapanca | Slobozia | left | 29 | |
| Rusenski Lom | Ruse | 497.8 | right | 45 |
| Oncești | near Gostinu | left | 9 | |
| Zboiul | near Oltenița | left | 28 | |
| Argeș | Oltenița, Romania | 430.0 | left | 350 |
| Mostiștea | Dorobanțu | left | 98 | |
| Berza | Bogata | left | 26 | |
| Almălău | Galița | right | 20 | |
| Canlia | Canlia | right | 8 | |
| Canaraua Fetei | Oltina | right | 16 | |
| Jegălia | Jegălia | left | ||
| Valea Mare | Dunăreni | right | 29 | |
| Urluia | Rasova | right | 98 | |
| Valea Rasovei | Rasova | right | ||
| Peștera | Cochirleni | right | 26 | |
| Țibrin | Seimeni | right | 41 | |
| Dunărea | Dunărea | right | 23 | |
| Calachioi | Capidava | right | ||
| Chichirgeaua | Tichilești | right | 17 | |
| Ialomița | Near Hârșova | left | 417 | |
| Călmățui | Berteștii de Jos | left | 152 | |
| Topolog | Saraiu | right | 50 | |
| Nămolești | Gârliciu | right | 20 | |
| Valea Roștilor | Ostrov | right | 28 | |
| Peceneaga | Peceneaga | right | 19 | |
| Cerna | near Peceneaga | right | ||
| Greci | near Turcoaia | right | 13 | |
| Jilila | Lake Jijila | right | 14 | |
| Siret | Galați, Romania | 155.05 | left | 647 |
| Prut | near Reni, Ukraine | 134.144 | left | 953 |
| Gârla Ciulineț | Rachelu | right |