1903–04 Scottish Cup#Final

{{Use dmy dates|date=October 2020}}

{{Infobox football tournament season

| title = Scottish Cup

| year = 1903–04

| other_title =

| image =

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| caption =

| country = Scotland

| num_teams =

| defending_champions = Rangers

| winners = Celtic

| second = Rangers

| matches =

| goals =

| scoring_leader =

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| prev_season = 1902–03

| next_season = 1904–05

}}

The 1903–04 Scottish Cup was the 31st season of Scotland's most prestigious football knockout competition. The cup was won by Celtic when they beat holders Rangers 3–2 in the final at the newly built Hampden Park to claim the trophy for a fourth time.[https://news.google.com/newspapers?id=2ulAAAAAIBAJ&sjid=d6YMAAAAIBAJ&pg=5977%2C1661398 Scottish Cup Final Tie. {{!}} Celtic v. Rangers.], The Glasgow Herald, 18 April 1904 The fixture may have been the point when the 'Old Firm' term began to be used in media to denote the relationship between the clubs, due to the increasing frequency of their meetings and the mutual commercial benefits of the growing rivalry.{{cite news|url=http://www.heraldscotland.com/sport/13198793.Six_classic_matches__the_birth_of_the_Old_Firm_and_the_day_Hampden_burned/|title=Six classic matches: the birth of the Old Firm and the day Hampden burned|date=26 January 2015|access-date=29 November 2017|publisher=The Herald}}{{cite news|url=http://www.scotsman.com/sport/football/teams/celtic/the-old-firm-story-when-fans-joined-forces-to-riot-1-4162491|title=The Old Firm story: When fans joined forces to riot|date=24 June 2016|access-date=29 November 2017|publisher=The Scotsman}}