The men's tournament of water polo at the 2004 Summer Olympics at Athens, Greece, began on August 15 and lasted until August 29, 2004.

[1] All times are Eastern European Time (UTC+3)

Five-time Olympian(s): 2 players Four-time Olympian(s): 8 players Three-time Olympic medalist(s): 2 players Source: Official Results Book (page 184)[12][13] Source: Official Results Book (page 180)[12][13] Source: Official Results Book (page 183)[12][13] The men's all-star team was announced on 29 August 2004.

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