The event was won by Jim Lightbody of the United States, the nation's first title in the 800 metres.

"[1] Johannes Runge of Germany had run the 800 metres handicap event earlier in the day due to confusion over English instructions.

The United States and Germany each made their second appearance, matching France, Great Britain, and Hungary for the most among all nations.

In contrast to the previous editions in 1896 and 1900, the 1904 version of the 800 metres consisted of a single round rather than heats and a final.

Breitkreutz took the lead over Runge (who had also run the 800 metres handicap event earlier in the day due to confusion), with Underwood second, before the final straight.