| Conventional Long Name: | Serb Autonomous Region of Northern Bosnia |
| Common Name: | SAO Northern Bosnia |
| Native Name: | |
| Capital: | Doboj |
| Coordinates: | 44.7314°N 18.0844°W |
| Government Type: | Provisional government |
| Status: | Unrecognised |
| Status Text: | Self-proclaimed entity |
| Year End: | 1992 |
| Life Span: | 1991–1992 |
| Year Start: | 1991 |
| Event Start: | Established |
| Event End: | Disestablished |
| P1: | Socialist Republic of Bosnia and Herzegovina |
| S1: | Republika Srpska (1992–95) |
| Flag P1: | Flag of SR Bosnia and Herzegovina.svg |
| Flag S1: | Flag of Republika Srpska.svg |
| Era: | Breakup of Yugoslavia |
| Flag: | Flag of Republika Srpska |
SAO Northern Bosnia (Serbian: САО Сјеверна Босна / SAO Sjeverna Bosna) was a self-proclaimed ethnic Serb Autonomous Region (Serbian: САО / SAO) in the Socialist Republic of Bosnia and Herzegovina (SRBiH) in the prelude to the Bosnian War. It was established on 4 November 1991,[1] [2] being the last SAO to be proclaimed. It existed between November 1991 and 9 January 1992, when it became part of Republic of the Serb people of Bosnia and Herzegovina (later Republika Srpska).[3] Blagoje Simić was the president of the Assembly of SAO Northern Bosnia from 4 November to 30 November 1991.[4] [5] Nikola Perišić was the President of the Executive Council of SAO Northern Bosnia from 4 November 1991 to 9 January 1992.
