Nysius graminicola is a species of seed bug in the subfamily Orsillinae and in the family Lygaeidae.

They occur in dry, warm, open areas with a sandy bottom.

[4] Nysius graminicola can reach a body length of about 3.6–5 mm (0.14–0.20 in).

The second segment of the antenna is light brown with a dark ring at the base.

[6] These bugs are polyphagous, living on plants of the family Asteraceae, such as wormwood (Artemisia), chamomile (Matricaria), Chrysanthemum and Centaury (Centaurea), Most likely imagoes hibernate.