The 1998 Argentine motorcycle Grand Prix was the last round of the 1998 Grand Prix motorcycle racing season.

It took place on 25 October 1998 at the Autódromo Oscar Alfredo Gálvez in Buenos Aires.

This race was known as being the final 500 cc victory for Australian Mick Doohan.

Below are the standings for the top five riders and constructors after round fourteen has concluded.

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