The Fucaceae are a family of brown algae, containing six genera:
- Ascophyllum <small>Stackhouse</small> – one species
- Fucus <small>L.</small> – 15 species
- Hesperophycus <small>Setchell & Gardner</small> – one species
- Pelvetia <small>Decne. & Thur.</small> – one species
- Pelvetiopsis <small>N.L.Gardner</small> – two species
- Silvetia <small>E.Serrão, T.O.Cho, S.M.Boo & S.H.Brawley</small> – three species
thumb|left|Dwarf rockweed, Pelvetiopsis limitata, north Moonstone near [[Cambria, CA ]]