| Krupský potok | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Slovakia |
| Subdivision Type4: | Counties |
| Subdivision Name4: | Trnava |
| Subdivision Type5: | Villages |
| Subdivision Name5: | Prekážka, Horná Krupá, Dolná Krupá, Špačince, Dolné Lovčice |
| Source1 Location: | Okrúhla, Little Carpathians |
| Source1 Elevation: | 350m (1,150feet) |
| Mouth: | Dolná Blava |
| Mouth Location: | Dolné Lovčice |
| Mouth Elevation: | 132m (433feet) |
| Progression: | Dolná Blava→ Dolný Dudváh→ Čierna voda→ |
| Length: | 30.7km (19.1miles) |
| Basin Size: | 131km2 |
The Krupský potok is a tributary of the Dolná Blava in Trnava District, Western Slovakia. Its source is located near Okrúhla in the Little Carpathians Mountains. It flows into the Dolná Blava in Dolné Lovčice. It is 30.7km (19.1miles) long and its basin size is 131km2.[1]