The Oakland Athletics' 1991 season was the team's 24th in Oakland, California. It was also the 91st season in franchise history. The team finished fourth in the American League West with a record of 84-78. The 1991 season saw the Athletics' American League dominance come to an abrupt end. Between 1988 and 1990, the team had won three American League pennants and one World Series title; in the process, they won a combined 306 regular season games. In light of these accomplishments, the Athletics were initially favored to win a fourth consecutive American League pennant.