Wieslochia weissi is an extinct species of passerine bird from the early Oligocene (27.8–33.9 Ma) of Germany.

[1] Remains of this species have been found in a clay pit in Frauenweiler near Wiesloch, Germany.

Another specimen consisting of a mandible and a cranium has been found in the same geological area.

The taxonomic affinities of Wieslochia are not well understood as it shares some similarities with suboscines but it seems more primitive in other features.

[1] A 2024 study found strong support for it and the related Crosnoornis being members of the Tyranni, either as stem group or crown group members of the Eurylaimides.