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1898 in Argentine football saw Lomas win its 5th Primera División championship within 6 seasons. The runner-up was Lobos. Flores and Belgrano A.C. "B" left the championship, being replaced by Lobos which returned to the Association.
Lomas and Lobos finished first with 20 points each so they had to play a match to define a champion. After the first game was declared null by the Association attending to a request by Lobos, a second match was played, winning Lomas the title.