Lyonia is a genus of flowering plants in the family Ericaceae.

There are about 35 species native to Asia and North America.

[1] These are shrubs and trees, deciduous or evergreen.

The leaves are spirally arranged and the inflorescences grow in the leaf axils.

[1] 37 fossil fruits of †Lyonia danica have been described from middle Miocene strata of the Fasterholt area near Silkeborg in Central Jutland, Denmark.