Coordinates: 50°25′12″N 4°44′11″W / 50.4199°N 4.7363°W / 50.4199; -4.7363
Breney Common is a nature reserve and Site of Special Scientific Interest, noted for its biological characteristics, in central Cornwall, England, UK. It is located mainly in Lanlivery civil parish, with the Saints' Way footpath running through it.
The common forms part of Breney Common and Goss and Tregoss Moors Special Area of Conservation. The nature reserve is owned by the Cornwall Wildlife Trust/Cornwall Trust for Nature.
This SSSI used to belong to the Red Moor–Breney Common SSSI, the two sites having split in the 1986 revision where both sites were expanded. There are now three adjacent nature reserves Breney Common, Red Moor and Helman Tor.