| Brenno | |
| Mouth: | Ticino |
| Mouth Location: | Biasca |
| Mouth Coordinates: | 46.3565°N 8.9539°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Switzerland |
| Length: | 40km (30miles) |
The Brenno is a 40km (30miles) long river in canton Ticino in Switzerland. It drains most of the Blenio Valley and it joins the Ticino between Pollegio and Biasca.