The New World genus Limnocoris Stål includes 73 described species, of which 13 are distributed in North America. A new species, Limnocoris rodriguesi Reynoso n. sp., from Mexico is described and illustrated, bringing the total number of species distributed in the country to eight. An updated checklist of the Mexican fauna of Limnocoris is presented and includes new state records for six species: Limnocoris hintoni La Rivers, L. inornatus Montandon, L. insularis Champion, L. lutzi La Rivers, L. pygmaeus La Rivers, and L. signoreti Montandon. Additionally, distribution maps for each of the species of Limnocoris in Mexico are presented.