Miesenbach bei Birkfeld is a municipality in the district of Weiz, in the Austrian state of Styria. It lies in the eastern part of Styria, within the Weiz district, which forms part of the larger Styria region of southeastern Austria.
As a municipality, it is one of the local administrative units that make up the Weiz district, alongside the district's other towns and communes. The name distinguishes it from other places called Miesenbach, identifying it specifically by its association with Birkfeld.