Yoldia is a genus of marine bivalve mollusks in the family Yoldiidae.

[1] Some former members of the genus are now known as Portlandia.

[2] The genus was named after Alfonso de Aguirre y Yoldi [dk], Conde de Yoldi (1764–1852), a Spanish nobleman in charge of the royal naturalistic collection of Denmark.

[3][4] Species that were within the genus Yoldia include:

This bivalve-related article is a stub.