Western Outlands
Territories ceded to Yugoslavia by Bulgaria according to 1920 Treaty of Neuilly
Ethnic map of Serbia according to the 2022 census; ethnic Bulgarian-majority municipalities in pale green
The Western (Bulgarian) Outlands (Bulgarian: Западни (български) покрайнини, romanized: Zapadni (bălgarski) pokrajnini) is a term used in Bulgarian to denote several regions located in ex-Yugoslavia, today southeastern Serbia and southeastern North Macedonia, that were traditionally part of Bulgaria and which were predominantly inhabited by ethnic Bulgarians (Bulgarians in Serbia, Bulgarians in North Macedonia).
The territories in question were ceded by Bulgaria to the Kingdom of the Serbs, Croats and Slovenes in 1920 as a result of the Treaty of Neuilly, following World War I. According to the 2022 Serbian census, two municipalities, Bosilegrad and Dimitrovgrad, are populated primarily by ethnic Bulgarians.