The 1989–90 season was Blackpool F.C.'s 82nd season (79th consecutive) in the Football League. They competed in the 24-team Division Three, then the third tier of English league football, finishing second-bottom. As a result, they were relegated to the league's basement division.
Jimmy Mullen replaced Sam Ellis as manager prior to the start of the season. It was to be his only season in charge of the club.
Blackpool had a prolonged run in the FA Cup, eventually succumbing to Queens Park Rangers after two fifth-round replays.
Andy Garner was the club's top scorer for the second consecutive season, with ten goals (eight in the league, one in the FA Cup and one in the League Cup).
Table
1. BRISTOL ROVERS (P) 46 15 8 0 43 14 11 7 5 28 21 93 2. BRISTOL CITY (P) 46 15 5 3 40 16 12 5 6 36 24 91 3. NOTTS COUNTY (P) 46 17 4 2 40 18 8 8 7 33 35 87 4. Tranmere Rovers 46 15 5 3 54 22 8 6 9 32 27 80 5. Bury 46 11 7 5 35 19 10 4 9 35 30 74 6. Bolton Wanderers 46 12 7 4 32 19 6 8 9 27 29 69 7. Birmingham City 46 10 7 6 33 19 8 5 10 27 40 66 8. Huddersfield Town 46 11 5 7 30 23 6 9 8 31 39 65 9. Rotherham United 46 12 6 5 48 28 5 7 11 23 34 64 10. Reading 46 10 9 4 33 21 5 10 8 24 32 64 11. Shrewsbury Town 46 10 9 4 38 24 6 6 11 21 30 63 12. Crewe Alexandra 46 10 8 5 32 24 5 9 9 24 29 62 13. Brentford 46 11 4 8 41 31 7 3 13 25 35 61 14. Leyton Orient 46 9 6 8 28 24 7 4 12 24 32 58 15. Mansfield Town 46 13 2 8 34 25 3 5 15 16 40 55 16. Chester City 46 11 7 5 30 23 2 8 13 13 32 54 17. Swansea City 46 10 6 7 25 27 4 6 13 20 36 54 18. Wigan Athletic 46 10 6 7 29 22 3 8 12 19 42 53 19. Preston North End 46 10 7 6 42 30 4 3 16 23 49 52 20. Fulham 46 8 8 7 33 27 4 7 12 22 39 51 21. CARDIFF CITY (R) 46 6 9 8 30 35 6 5 12 21 35 50 22. NORTHAMPTON (R) 46 7 7 9 27 31 4 7 12 24 37 47 23. BLACKPOOL (R) 46 8 6 9 29 33 2 10 11 20 40 46 24. WALSALL (R) 46 6 8 9 23 30 3 6 14 17 42 41P = Matches played; W = Matches won; D = Matches drawn; L = Matches lost; F = Goals for; A = Goals against; GD = Goal difference; Pts = Points