List of rivers of Romania
| Geography of Romania |
| Topography |
| Hydrography |
| Climate |
This is the list of longest rivers of Romania which entirely or partially flow through Romania. For the full list in alphabetical order, see List of rivers of Romania (alphabetic).
Longest rivers of Romania
The length represents only the part of the river that flows in Romania.
| River name | Length of the river (km) | Drainage area (km²) |
|---|---|---|
| Danube | 1,075 | |
| Mureș | 761 | 28,310 |
| Prut | 742 | 11,990 |
| Olt | 615 | 24,050 |
| Siret | 559 | 42,890 |
| Ialomița | 417 | 10,350 |
| Someș | 376 | 15,740 |
| Argeș | 350 | 12,550 |
| Jiu | 339 | 10,080 |
| Buzău | 302 | 5,264 |
| Dâmbovița | 286 | 2,824 |
| Bistrița | 283 | 7,039 |
| Jijia | 275 | 5,757 |
| Târnava Mare | 246 | 6,253 |
| Timiș | 244 | 5,673 |
| Crișul Alb | 234 | 4,240 |
| Vedea | 224 | 5,430 |
| Moldova | 213 | 4,299 |
| Bârlad | 207 | 7,220 |
| Târnava Mică | 196 | 2,071 |
| Prahova | 193 | 3,738 |
| Neajlov | 186 | 3,720 |
| Olteț | 185 | 2,663 |
| Someșul Mic | 178 | 3,773 |
| Suceava | 173 | 2,298 |
| Bega | 170 | 2,362 |
| Arieș | 166 | 3,005 |
| Trotuș | 162 | 4,456 |