1991 PBA season

Infobox sports season
title =1991 PBA season
logo =
league =Philippine Basketball Association
sport =Basketball
duration =February, 1991 – December, 1991
TV =Vintage Sports (PTV)
season =Season
MVP =Alvin Patrimonio
MVP_link =Philippine Basketball Association Most Valuable Player award
seasonslist = List of PBA seasons
seasonslistnames = PBA
prevseason_link =1990 PBA season
prevseason_year =1990
nextseason_link =1992 PBA season
nextseason_year =1992The 1991 PBA season was the seventeenth season of the Philippine Basketball Association (PBA). Ginebra San Miguel made news when they won the First Conference championship by coming back from a 3-1 deficit to beat archrival Shell for the crown. Another rivalry loomed in the All-Filipino Conference as corporate rivals Purefoods TJ Hotdogs and Diet Sarsi faced off for the crown. Purefoods won the series, ending three years of perennial bridesmaid finish in that conference. The Ginebra squad came back in the Third Conference finals but lost to the Alaska Milkmen, who bagged their first PBA championship with import Sean Chambers leading them.

Champions

* First Conference: Ginebra San Miguel
* All-Filipino Cup: Purefoods TJ Hotdogs
* Third Conference: Alaska Milkmen

* Team with best win-loss percentage: Alaska (31-25, .554)

Individual awards

* Most Valuable Player: Alvin Patrimonio (Purefoods)
* Rookie of the Year: Eugene Quilban (Alaska)
* Most Improved Player: Ato Agustin (San Miguel)
* Mythical Five:
**Jojo Lastimosa (Alaska)
**Allan Caidic (Presto Tivoli)
**Ramon Fernandez (San Miguel)
**Alvin Patrimonio (Purefoods)
**Benjie Paras (Shell)

* Mythical Second Team:
**Ronnie Magsanoc (Shell)
**Ato Agustin (San Miguel)
**Jerry Codiñera (Purefoods)
**Alvin Teng (San Miguel)
**Yoyoy Villamin (Sarsi)

* All-Defensive Team:
**Jerry Codiñera (Purefoods)
**Glenn Capacio (Purefoods)
**Alvin Teng (San Miguel)
**Biboy Ravanes (Alaska)
**Chito Loyzaga (Ginebra)

PBAseason
year=1991
Conference 1=First Conference
Conference 2=All-Filipino Cup
Conference 3=Third ConferencePBA seasons