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.

Twenty-three players made at least one appearance in nationally organised first-team competition, and there were twelve different goalscorers. Midfielder Johnny Vincent played in 46 of the 48 first-team matches over the season. Fred Pickering and Phil Summerill finished as joint leading goalscorers with 17 goals in all competitions; the best goal return in League competition was Summerill's 16.

On 7 September 1968, the home match against Huddersfield Town saw Geoff Vowden become the first substitute to score a hat-trick in a Football League match.

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