| Season: | 1951–52 |
| Chairman: | Sir Herbert Merrett[1] |
| League Result: | 2nd |
| Cup1 Result: | 3rd round |
| Cup2 Result: | 6th round |
| Average Attendance: | 28,945 |
| Highest Attendance: | 46,003 v Swansea Town 26 December 1951 |
| Lowest Attendance: | 19,860 v Nottingham Forest 22 December 1951 |
| League Topscorer: | Wilf Grant (26) |
| Season Topscorer: | Wilf Grant (27) |
| Pattern B1: | _whitecollarplain |
| Pattern So1: | _hoops_blue |
| Leftarm1: | 0000ff |
| Body1: | 0000ff |
| Rightarm1: | 0000ff |
| Shorts1: | ffffff |
| Socks1: | ffffff |
| Nextseason: | 1952–53 |
The 1951–52 season was Cardiff City F.C.'s 25th season in the Football League. 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.[2]