The Netherlands Football League Championship 1903–1904 was contested by seventeen teams participating in three divisions. This season, the western division had been split in two, creating the Eerste Klasse West-A and the Eerste Klasse West-B. The national champion would be determined by a play-off featuring the winners of the three divisions of the Netherlands. HBS Craeyenhout won this year's championship by beating Velocitas and PW.

Eerste Klasse East:

• GVC Wageningen, the result of a merger between last years competitors Go Ahead Wageningen and Victoria Wageningen

Eerste Klasse West-A:
Moved from Division West-B:

• HBS Craeyenhout
• Koninklijke HFC
• Quick 1890

Eerste Klasse West-B:
Moved from Division West-A:

• HFC Haarlem
• HVV Den Haag
• Velocitas

• RSSSF Netherlands Football League Championships 1898-1954
• RSSSF Eerste Klasse Oost
• RSSSF Eerste Klasse West