Apodemia walkeri, or Walker's metalmark, is a butterfly in the family Riodinidae (metalmarks), in the superfamily Papilionoidea (butterflies and skippers). The species was described by Frederick DuCane Godman and Osbert Salvin in 1886. It is found from north-western Costa Rica north through Mexico. It is an occasional visitor to the lower Rio Grande Valley in southern Texas. The habitat consists of subtropical scrubs and forests. The wingspan is 20–25 mm. The upperside of the wings is grey with blurred white areas and orange marginal bands. The underside is white with orange marginal bands and small black marks. Adults are on wing in June and October in the northern part of its range and year-round further south. The MONA or Hodges number for Apodemia walkeri is 4406.

- Pelham, Jonathan P. (2008). "A catalogue of the butterflies of the United States and Canada with a complete bibliography of the descriptive and systematic literature". Journal of Research on the Lepidoptera, vol. 40, xiv + 658. - Arnett, Ross H. (2000). American Insects: A Handbook of the Insects of America North of Mexico. CRC Press.