2003–04 Hong Kong FA Cup was the 30th staging of the Hong Kong FA Cup.
The competition started on 27 April 2004 with 10 Hong Kong First Division clubs.
Four of them took part in the first round to determine which team advanced to the quarter-finals.
From quarter finals onward, the cup competition was a single-elimination tournament.
The competition was officially known as 2003/04 HKFA Dongguan Centurycity Real Estate FA Cup due to sponsorship from Dongguan Centurycity Real Estate Development Limited.