| Copa del Rey | |
| Year: | 1982–83 |
| Other Titles: | 81st Copa del Rey |
| Country: |  Spain |
| Dates: | 8 September 1982 – |
| Num Teams: | 135 |
| Winners: | FC Barcelona |
| Second: | Real Madrid CF |
| Matches: | 267 |
| Goals: | 733 |
| Prev Season: | 1981–82 |
| Next Season: | 1983–84 |
The 1982–83 Copa del Rey was the 81st staging of the Spanish Cup, the annual domestic football cup competition in Spain. The tournament was attended by 135 teams from the higher echelons of Spanish football.
The tournament began on 8 September 1982 and ended on 4 June 1983 with the final, held in La Romareda Stadium in Zaragoza, in which FC Barcelona were crowned for the twentieth time in their history, after beating the defending champions of the tournament, Real Madrid CF by a score of 2–1.
This was the fourth time these two teams had met in the final, known as El Clásico, with a favourable balance for the Catalans.
| Round | Fixture | Clubs | Gain entry |
|---|---|---|---|
| First round | 63 | 135 → 72 | All clubs participating gain entry |
| Second round | 33 | 72 → 39 | Athletic Bilbao, Real Betis (*) |
| Third round | 17 | 39 → 22 | |
| Fourth round | 6 | 22 → 16 | Sevilla FC (*) |
| Round Of 16 | 8 | 16 → 8 | FC Barcelona, Real Madrid CF, Real Sociedad, Valencia CF (*) |
| Quarter-finals | 4 | 8 → 4 | |
| Semi-finals | 2 | 4 → 2 | |
| Final | 1 | 2 → 1 |
| 1ª División | 18 | |
| 2ª División | 20 | |
| 2ª División B | 25 | |
| 3ª División | 72 | |
| Total teams | 135 |
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See main article: 1983 Copa del Rey Final.