The genus Eumerus Meigen, 1822 (Eristalinae: Merodontini) comprises 250+ described species worldwide. Within this genus, the Eumerus tricolor group is the largest of all those defined so far, and one of the groups with the highest level of morphological similarity. The E. tricolor group has 37 described species, of which nine are reported from the Iberian Peninsula. The aims of this work are (1) to update the taxonomic knowledge of the Iberian species of this group and (2) to confirm the validity of putative new species through morphological and molecular data (5' and 3' end regions of the Cytochrome c oxidase subunit I). The new species were found to be similar to Eumerus sabulonum (Fállen, 1847) and Eumerus grandis Meigen, 1822 and collected in southern Spain and Pyrenees, respectively. The systematic position of the new species in the framework of the E. tricolor group are assessed and discussed. Other novel taxonomic and faunistic data of species of the E. tricolor group from the Iberian Peninsula are provided. This research belongs to the ‘Fauna Ibérica' project (PGC2018-095851-A-C65) of the ‘Ministerio de Ciencia, Innovación y Universidades', as well as to Pablo Aguado-Aranda's PhD (PRE2019-087508) and to the UATALENTO17-08 of the ‘Vicerrectorado de Investigación y Transferencia del Conocimiento' of the University of Alicante.