The administrative districts (Serbian: управни окрузи, romanized: upravni okruzi) of Serbia are the country's first-level administrative division.

It can be translated as "county", though it is generally rendered by the government as "district".

The local government reforms of 1992, going into effect the following year, created 29 districts, with the City of Belgrade having similar status.

As they are mere designations of territorial remit of regional administrative centres through which the central government exercises its power within a hierarchical order, the districts are distinctly not units of regional self-governance, and as such they do not have flags.

Administrative districts were first defined by the Government of Serbia's decree of 29 January 1992, which specifies that ministries and other national-level agencies shall conduct their affairs outside their headquarters (i.e. outside the seat of government) via regional offices that they may establish per the designated clusters of municipalities (named only "districts"), also designating the administrative seat of each district ("regional centre of state administration").