The 1989–90 season was Cardiff City F.C.'s 63rd season in the Football League. They competed in the 24-team Division Three, then the third tier of English football, finishing twenty-first, suffering relegation to Division Four.

Manager Frank Burrows left the club in the first month of the year to become assistant manager at Portsmouth and was replaced by Len Ashurst, who started his second spell in charge of the club.

First team squad. ^[1] Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply. Players may hold more than one non-FIFA nationality.

No. Pos. Nation Player -- GK  ENG Roger Hansbury -- GK  ENG Gavin Ward -- GK  SCO George Wood -- DF  WAL Gareth Abraham -- DF  WAL Phil Bater -- DF  ENG Ray Daniel -- DF  WAL Allan Lewis -- DF  GER Mario Miethig -- DF  WAL Jason Perry -- DF  ENG Cliff Powell -- DF  ENG Ian Rodgerson -- DF  WAL Damon Searle -- DF  ENG Eddie Youds -- MF  ENG Leigh Barnard -- MF  ENG Jeff Chandler -- MF  WAL Chris Fry -- MF  GUY Cohen Griffith

No. Pos. Nation Player -- MF  WAL Jason Gummer -- MF  ENG Mark Kelly -- MF  SCO David Kevan -- MF  ENG Steve Lynex -- MF  WAL Jon Morgan -- MF  EIR Pat O'Hagan -- MF  ENG Chris Thompson -- MF  ENG Steve Tupling -- MF  ENG Paul Wheeler -- FW  WAL Nathan Blake -- FW  WAL Alan Curtis -- FW  ENG Jimmy Gilligan -- FW  WAL Richard Haig -- FW  WAL Ian Love -- FW  WAL Morrys Scott -- FW  ENG Richard Sendall

Pos	Team	Pld	W	D	L	GF	GA	GD	Pts	Promotion or relegation
19	Preston North End	46	14	10	22	65	79	−14	52
20	Fulham	46	12	15	19	55	66	−11	51
21	Cardiff City	46	12	14	20	51	70	−19	50	Relegated
22	Northampton Town	46	11	14	21	51	68	−17	47
23	Blackpool	46	10	16	20	49	73	−24	46

Source ^{[2] [3]}

• List of Cardiff City F.C. seasons

• Hayes, Dean (2006). The Who's Who of Cardiff City. Breedon Books. ISBN 1-85983-462-0.
• Crooks, John (1986). Cardiff City Chronology 1920-86. John Crooks. ISBN 0-9511984-0-8.
• Shepherd, Richard (2002). The Definitive Cardiff City F.C. Tony Brown. ISBN 1-899-46817-X.
• Crooks, John (1992). Cardiff City Football Club: Official History of the Bluebirds. Yore Publications. ISBN 0-9513321-8-X.
• Rollin, Jack, ed. (1990). Rothmans Football Yearbook 1990-91. Queen Anne Press. ISBN 0-356-17911-7.

• "Football Club History Database – Cardiff City". Archived from the original on 30 December 2008. Retrieved 16 December 2008.

• Welsh Football Data Archive