Haematomma nicoyense is a species of corticolous (bark-dwelling) lichen in the family Haematommataceae.

Found in Costa Rica, it was formally described as a new species in 2006 by Matthew Nelsen, Robert Lücking, and José Luis Chaves.

The type specimen was collected from the Monte Alto Forest Reserve in the Nicoya Peninsula at an elevation between 750 and 900 m (2,460 and 2,950 ft).

Ascospores number eight per ascus, and are narrowly fusiform (spindle-shaped) with between 3 and 6 septa and have dimensions of 40–65 by 3–4 μm.

Lichen products found in Haematomma nicoyense include russulone, atranorin, and sphaerophorin.