The SAO of Herzegovina (Serbian: Српска аутономна област Херцеговина, Srpska autonomna oblast Hercegovina) was a self-proclaimed Serbian Autonomous Oblast within today's Bosnia and Herzegovina.

It was proclaimed by the Assembly of the Association of Municipalities of Bosnian Krajina in 1991[1] and was subsequently included into Republika Srpska.

[citation needed] SAO Herzegovina was formed from the Association of Municipalities (a government in SFRY) known as Assembly of the Communities of East Herzegovina, which was formed on 27 May 1991.

The SAO East and Old Herzegovina was established on September 12, 1991.

[2] It consisted of East Herzegovina which had a Serb ethnic majority.