Fusconaia flava, the Wabash pigtoe, is a freshwater mussel in the family Unionidae.

This species occurs in southern Manitoba and Ontario, Canada as well as in the eastern and midwestern United States from North Dakota to New York, south to Mississippi and Texas.

Fusconaia flava shell is thick and can be compressed or inflated, has a triangular to an elongate triangle shape.

Known host species for Fusconaia flava include silver shiner (Notropis photogenis) and creek chub (Semotilus atromaculatus).

Fusconaia flava can be found in lotic habitat anywhere from small streams to large rivers, and can handle various types of substrate including mud, sand, or gravel.