Graphis insularis is a species of script lichen in the family Graphidaceae.

[1] Found in the Andaman Islands, it was formally described as a new species in 2005 by Urmila Makhija and Bharati Adawadkar.

The species epithet insularis, from the Latin word for island, refers to the type locality.

[2] The lichen has a yellowish to whitish-grey thallus with a rough and uneven surface texture that cracks with age.

The ascomata are in the form of lirellae, which are slender and black, immersed in the substrate, and measure 0.5–9 mm long.