The 1951–52 season was Cardiff City F.C.

They competed in the 22-team Division Two, then the second tier of English football, finishing second, winning promotion to Division One.

After a 3–1 victory over Milford United, Cardiff were eliminated in the sixth round by Merthyr Tydfil.

[3] Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Players may hold more than one non-FIFA nationality.