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Yugoslav First B Federal League
Organising body	BFY
Founded	1980
First season	1980–81
Folded	1992
Country	Yugoslavia
Divisions	2
Level on pyramid	2
Feeder to	FIBA Europe
Promotion to	Yugoslav First Federal League
Domestic cup(s)	Yugoslav Cup

The Yugoslav First B Federal Basketball League (Serbo-Croatian: Prva B savezna košarkaška liga) was the second-tier level club basketball league of SFR Yugoslavia. The league's top performing clubs of each season, were promoted up to the top tier level, the Yugoslav First Federal League.

Winners

Season	West	East	Ref.
1979-80	Kvarner	Budućnost
Season	Champion		Ref.
1980–81	Borac Čačak
1981–82	Jugoplastika
1982–83	IMT
1983–84	Radnički Belgrade
Season	West	East	Ref.
1984–85	Smelt Olimpija	Rabotnički	^[1]
1985–86	Sloboda Dita Tuzla	MZT Skopje	^[2]
1986–87	Smelt Olimpija	IMT	^[3]
1987–88	Vojvodina	Prvi partizan Užice	^[4]
1988–89	Sloboda Dita Tuzla	Zorka Šabac	^[5]
1989–90	Šibenka	Budućnost	^[6]
1990–91	Oveco Zagreb	Rabotnički	^[7]
Season	Champion		Ref.
1991–92	Iva Šabac		^[8]

In 2017, the ABA League, which is the successor league to the Yugoslav First Federal League, created the Adriatic League Second Division, which is the successor league to the Yugoslav First B Federal League.

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^ "ABELA - I "B" LIGA 1986 / 1987" (PDF). okkbeograd.org.rs. Retrieved 19 June 2022.
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^ "TABELA - I "B" LIGA 1988 / 1989" (PDF). okkbeograd.org.rs. Retrieved 19 June 2022.
^ "TABELA - I "B" LIGA 1989 / 1990" (PDF). okkbeograd.org.rs. Retrieved 19 June 2022.
^ "TABELA - I "B" LIGA 1990 / 1991" (PDF). okkbeograd.org.rs. Retrieved 19 June 2022.
^ "TABELA - I "B" LIGA 1991 / 1992" (PDF). okkbeograd.org.rs. Retrieved 19 June 2022.