Bezirk Südoststeiermark (Austrian German: [sydˈɔstˌʃtaɪɐmark]; "South East Styria") is a district of the state of Styria in Austria.

It was formed on January 1, 2013 through a merger of the former Radkersburg District and Feldbach District.

[1] Until the end of 2014 Südoststeiermark incorporated 74 municipalities.

Since the 1 January Styria municipal structural reform, the district consists of 26 municipalities,[2] since 2020 the following 25 municipalities: