Lecidea griseomarginata is a species of lichen in the family Lecideaceae.

Found in Alaska, it was described as a new species in 2020 by lichenologist Alan Fryday.

The type specimen was collected in the Hoonah-Angoon Census Area of Glacier Bay National Park, where it was found growing on a granitic rock along the shoreline of Ptarmigan Creek.

The specific epithet griseomarginata refers to the gray proper margin of the apothecia.

This Lecanoromycetes-related article is a stub.