The 1998–99 Liga Femenina de Baloncesto was the 37th edition of Spain's premier championship for women's basketball clubs. Defending champion Celta Vigo defeated CB Islas Canarias in the play-off's final to win its fifth title.^[1] CD Ensino and Ros Casares Valencia also reached the play-offs. On the other hand, CB Tres Cantos and Baloncesto Alcalá were relegated as the bottom teams.^[2]

Autonomous community	Teams
Galicia	3: CD Ensino, Simeón Celta, Grupo 10 Cortegada
Madrid	3: Baloncesto Alcalá, Real Canoe, CB Tres Cantos
Castilla-León	2: Halcón Avenida, Ciudad de Burgos
Catalunya	2: Universitari Barcelona, CB Santa Rosa de Lima
Asturias	1: Universidad Oviedo
Comunidad Valenciana	1: Popular Godella
Islas Canarias	1: Sandra Islas Canarias
Navarra	1: CB Navarra

#	Teams	Pld	W	L	PF	PA	PS	Q/R
1	Sandra Islas Canarias	26	23	3	1969	1524	1	Qualified for the play-offs
2	Celta Vigo	26	21	5	1771	1467	1	Qualified for the play-offs
3	Yaya María Ensino	26	20	6	1890	1643	2	Qualified for the play-offs
4	Ros Casares Valencia	26	18	8	1876	1570	2	Qualified for the play-offs
5	Halcón Avenida	26	18	8	2036	1836	1
6	Universitari Barcelona	26	17	9	1954	1718	3
7	Real Canoe	26	15	11	1670	1653	2
8	Ciudad de Burgos	26	14	12	1716	1701	3
9	Grupo 10 Cortegada	26	13	13	1705	1637	1
10	CB Santa Rosa de Lima	26	6	20	1490	1733
11	Universidad Oviedo	26	6	20	1588	1854	3
12	CB Navarra	26	5	21	1392	1760
13	CB Tres Cantos	26	3	23	1507	2080	1	Relegated to 1ª División
14	Bal. Alcalá	26	3	23	1485	1873		Relegated to 1ª División

Liga Femenina de Baloncesto 1999–2000 Champions
Celta Vigo Fifth title