| 1899–1900 St Helens RLFC season | 
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| 1898–99 Northern Rugby Football Union season Rank | 4th | 
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| Challenge Cup | First round | 
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| 1899–1900 record | Wins: 16; draws: 3; losses: 8 | 
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| Points scored | For: 207; against: 119 | 
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The 1899–1900 season was St Helens' fifth in the Northern Rugby Football Union, the 26th in their history. In their highest ever finish in a rugby league competition, and their most successful season, the club finished fourth in the Lancashire Senior Championship.[1] In the Challenge Cup, St Helens were beaten in the first round by rivals Warrington. However, they did manage some silverware in the season, by beating league winners Runcorn 6-0 in the South Lancashire Cup final.[2]
Lancashire Senior Championship
References
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| The Club |  | 
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| Home grounds |  | 
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| League |  | 
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| World Club Challenge (3) |  | 
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| Championships (17) |  | 
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| Challenge Cup (13) |  | 
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| League Leaders Shield (9) |  | 
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| Other honours |  | 
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| Seasons |  | 
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| Culture |  | 
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| Affiliation |  | 
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