Lambdopsalidae is a family of extinct multituberculate mammals from the Late Paleocene of Asia.

They are part of Taeniolabidoidea, a clade otherwise present in the Early Paleocene (and possibly the Late Cretaceous) of North America.

The Lambdopsalids probably evolved from a single radiation that spread into Asia from North America in the mid-Paleocene or earlier.

[5][6] This group has a shared dental formula of 2.0.1.21.0.1.2[3] Examples of Lambdopsalis are notable for offering direct evidence of hair and enamel and tooth prism patterns among multituberculates.

[7] Lambdopsalids lived during the Thanetian, the last stage of the Paleocene, with fossils ranging from 59-55 million years ago.