| Budac | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Bistrița-Năsăud County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Dumitrița, Orheiu Bistriţei, Budacu de Jos |
| Length: | 44km (27miles) |
| Mouth: | Șieu |
| Mouth Location: | Monariu |
| Mouth Coordinates: | 47.051°N 24.4472°W |
| Basin Size: | 241km2 |
| Tributaries Left: | Șes, Buduș |
| Tributaries Right: | Bolovan, Budușel |
The Budac is a right tributary of the river Șieu in Romania. Its source is in the Călimani Mountains. It flows through the villages Budacu de Sus, Dumitrița, Orheiu Bistriţei and Budacu de Jos and discharges into the Șieu near Monariu.[1] Its length is 44km (27miles) and its basin size is 241km2.