Hopton Fen is a 15.3-hectare (38-acre) biological Site of Special Scientific Interest north of Hopton in Suffolk.

[1][2] It is managed by the Suffolk Wildlife Trust.

[3] This reed-dominated fen has diverse flora, including devil's bit scabious, black bog-rush, bogbeana and early marsh orchid.

The Trust is improving the site by excavating new pools, and introducing grazing to restore the open landscape.

[3][4] There is access by a footpath from Hopton.