Weißkirchen in Steiermark is a municipality in the district of Murtal in the Austrian state of Styria. It lies in the federal province of Styria, in the south-central part of the country.
The municipality belongs to the Murtal district, one of Styria's administrative districts, which takes its name from the Mur river valley that runs through the region. As a municipality, Weißkirchen in Steiermark forms a single local administrative unit comprising the town and its surrounding area.
Its position within the Murtal district places it in the wider Alpine and sub-Alpine landscape of Upper Styria, a region historically shaped by agriculture, forestry, and industry along the Mur. Detailed information on the municipality's population, area, and constituent settlements is recorded in Austrian official statistics.