| Competition: | Categoría Primera B |
| Season: | 1991 |
| Winners: | Envigado (1st title) |
| Promoted: | Envigado |
| League Topscorer: | Mayid Arias (8 goals) |
| Nextseason: | 1992 |
The 1991 Categoría Primera B season, (officially known as the 1991 Copa Concasa for sponsorship reasons) was the first season of Colombia's second division football league. The first match of the competition was played on 20 April 1991 in Bogotá, a 1–1 draw between El Cóndor and Alianza Llanos.[1]
Envigado won the tournament and became the first team to be promoted to the Categoría Primera A.[2] Mayid Arias, playing for Alianza Llanos, was the topscorer with 8 goals.[3] [4]
| Team | City | Stadium | |
|---|---|---|---|
| Academia Bogotana | Bogotá | El Campincito | |
| Alianza Llanos | Villavicencio | Manuel Calle Lombana | |
| Atlético Buenaventura | Buenaventura | Marino Klinger | |
| Atlético Huila | Neiva | Guillermo Plazas Alcid | |
| Cortuluá | Tuluá | Doce de Octubre | |
| Deportes Dinastía | Riosucio | El Vergel | |
| Deportivo Armenia | Armenia | San José | |
| Deportivo Rionegro | Rionegro | Alberto Grisales | |
| El Cóndor | Bogotá | El Campincito | |
| Envigado | Envigado | Polideportivo Sur |
| Rank | Player | Club | Goals | |
|---|---|---|---|---|
| align=center | 1 |  Mayid Arias | Alianza Llanos | 8 |
| 2 | Manuel Arquímedes | El Cóndor | 7 | |
| Jorge Iván Hoyos | Envigado |
Source: Historia del Fútbol Profesional Colombiano 70 Años