Trøndersk is the Norwegian dialect spoken in the region Trøndelag in Norway. Historically it also applied to contiguous regions of Jämtland, Härjedalen (referred to as "Øst-Trøndelag" by some locals) in Sweden as well.

It is also an adjective describing a Trønder (a person from Trøndelag) or anything coming from or relating to Trøndelag, e.g. Trønder-Avisa.