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The 1974 Mr. Olympia contest was an IFBB professional bodybuilding competition held in October 1974 at the Felt Forum in New York City, New York. It was the 10th Mr. Olympia competition held.
- Arnold Schwarzenegger won his fifth consecutive Mr. Olympia title
- This was the first Mr. Olympia to have two weight classes; the two-class scoring system would continue until the 1979 contest