The 1969–70 Football League season was Birmingham City Football Club's 66th in the Football League and their 28th in the Second Division. They made a poor start, suffering seven defeats in the first nine matches, but an improved second half of the season led to a seventh-place finish in the 22-team division. They entered the 1969–70 FA Cup in the third round proper, reaching the fifth round in which they lost to Manchester United after a replay, and were beaten by Chelsea in their opening second-round match in the League Cup.