| Competition: | Segunda División B |
| Season: | 1985–86 |
| Winners: | Figueres Xerez |
| Promoted: | Figueres Xerez |
| Relegated: | Alavés Alcalá Algeciras Andorra Arosa Barcelona Aficionados Betis Deportivo Binéfar Compostela FC Andorra Gimnàstic Jaén L'Hospitalet Lalín Levante Linares Lorca Manacor Orihuela Parla Plasencia Puertollano Sporting Atlético Talavera Zamora |
| League Topscorer: | Antonio Cuevas (25 goals) |
| Best Goalkeeper: | Carlos Osma (0.63 goals/match) |
| Biggest Home Win: | (22 December 1985) (22 December 1985) |
| Biggest Away Win: | (23 February 1986) |
| Highest Scoring: | (22 December 1985) |
| Matches: | 760 |
| Total Goals: | 1822 |
| Prevseason: | 1984–85 |
| Nextseason: | 1986–87 |
The 1985–86 Segunda División B season was the 9th since its establishment. The first matches of the season were played on 31 August 1985, and the season ended in 18 May 1986.
40 teams joined the league, including four relegated from the 1984–85 Segunda División and 6 promoted from the 1984–85 Tercera División. The composition of the groups was determined by the Royal Spanish Football Federation, attending to geographical criteria.
Teams from Andorra, Aragon, Asturias, Basque Country, Castile and León, Catalonia and Galicia.
| Team | Founded | Home city | Stadium | |
|---|---|---|---|---|
| Alavés | 1921 | Vitoria-Gasteiz, Basque Country | Mendizorrotza | |
| Andorra | 1957 | Andorra, Aragon | Juan Antonio Endeiza | |
| FC Andorra | 1942 | Andorra la Vella, Andorra | Comunal | |
| Arosa | 1945 | Vilagarcía de Arousa, Galicia | A Lomba | |
| Barcelona Aficionados | 1967 | Barcelona, Catalonia | Mini Estadi | |
| Binéfar | 1922 | Binéfar, Aragon | El Segalar | |
| Real Burgos | 1983 | Burgos | El Plantío | |
| Compostela | 1962 | Compostela, Galicia | Santa Isabel | |
| Figueres | 1919 | Figueres, Catalonia | L'Alfar | |
| Gimnàstic de Tarragona | 1886 | Tarragona, Catalonia | Nou Estadi | |
| Hospitalet | 1957 | L'Hospitalet de Llobregat, Catalonia | Municipal de Deportes | |
| Lalín | 1974 | Lalín, Galicia | Manuel Anxo Cortizo | |
| Lleida | 1939 | Lleida | Camp d'Esports | |
| Orense | 1952 | Ourense, Galicia | O Couto | |
| Palencia | 1960 | Palencia, Castile and León | La Balastera | |
| Pontevedra | 1941 | Pontevedra, Galicia | Pasarón | |
| Salamanca | 1923 | Salamanca, Castile and León | Helmántico | |
| San Sebastián | 1951 | San Sebastián, Basque Country | Atotxa | |
| Sporting Atlético | 1960 | Gijón, Asturias | Mareo | |
| Zamora | 1968 | Zamora, Castile and León | Ramiro Ledesma |
| Goalscorers | Goals | Team |
|---|---|---|
 Antonio Cuevas | 25 | Figueres |
| Martín Begiristain | 20 | San Sebastián |
| César Melo | 16 | Compostela |
| 15 | L'Hospitalet | |
| Martín Domínguez | 14 | Barcelona Aficionados |
| Goalkeeper | Goals | Matches | Average | Team | |
|---|---|---|---|---|---|
| Roberto Santamaría | 20 | 29 | Lleida | ||
| Ángel Lozano | 29 | 36 | Salamanca | ||
| Francesc Boix | 31 | 38 | Figueres | ||
| Iñaki Bergara | 31 | 38 | Alavés | ||
| Fermín Hortas | 31 | 36 | Ourense |
Teams from Andalusia, Balearic Islands, Castilla–La Mancha, Ceuta, Extremadura, Madrid, Region of Murcia and Valencian Community.
| Team | Founded | Home city | Stadium | |
|---|---|---|---|---|
| Alcalá | 1923 | Alcalá de Henares, Madrid | El Val | |
| Alcoyano | 1928 | Alcoy, Valencian Community | El Collao | |
| Algeciras | 1909 | Algeciras, Andalusia | El Mirador | |
| Betis Deportivo | 1962 | Seville, Andalusia | Benito Villamarín | |
| Calvo Sotelo | 1948 | Puertollano, Castilla–La Mancha | Empetrol | |
| Ceuta | 1970 | Ceuta | Alfonso Murube | |
| Córdoba | 1954 | Córdoba, Andalusia | El Arcángel | |
| Granada | 1931 | Granada, Andalusia | Los Cármenes | |
| Real Jaén | 1929 | Jaén, Andalusia | La Victoria | |
| Levante | 1909 | Valencia, Valencian Community | Nou Estadi Llevant | |
| Linares | 1961 | Linares, Andalusia | Linarejos | |
| Linense | 1912 | La Línea de la Concepción, Andalusia | Municipal La Línea de la Concepción | |
| Lorca | 1969 | Lorca, Region of Murcia | San José | |
| Manacor | 1923 | Manacor, Balearic Islands | Na Capellera | |
| Orihuela | 1944 | Orihuela, Valencian Community | Los Arcos | |
| Parla | 1973 | Parla, Madrid | Los Prados | |
| Plasencia | 1941 | Plasencia, Extremadura | Ciudad Deportiva | |
| Poblense | 1935 | Sa Pobla, Balearic Islands | Nou Camp Sa Pobla | |
| Talavera | 1948 | Talavera de la Reina, Castilla–La Mancha | El Prado | |
| Xerez | 1947 | Jerez de la Frontera, Andalusia | Domecq |
| Goalscorers | Goals | Team |
|---|---|---|
| Paquito | 24 | Granada |
| Argimiro Márquez | 22 | Linense |
| Antonio Torres | 14 | Xerez |
| 13 | Linense | |
| Andrés Pizarro | 13 | Poblense |
| Goalkeeper | Goals | Matches | Average | Team | |
|---|---|---|---|---|---|
| Carlos Osma | 24 | 38 | Xerez | ||
| Juan Braojos | 25 | 31 | Linares | ||
| Tomás Cuenca | 28 | 31 | Alcoyano | ||
| José Luis Burgueña | 35 | 38 | Ceuta | ||
| José María Olivares | 35 | 36 | Alcalá |