Ralph Kirby may refer to:

• Conyers Kirby (1884–1946), also known as Ralph Kirby, English footballer
• Ralph Kirby (American football), American football coach

• Parallel literature
• Parallel Lives (Bernice Summerfield)
• Parallel Lives (disambiguation)
• Parallel Lives (film)
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• Parallel octaves Parallel fifths
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• Parallel-plate flow chamber
• Parallel Play (EP)
• Parallel Play (memoir by Tim Page)
• Parallel Play (Panama Wedding EP)