The 1909 Campeonato Carioca, the fourth edition of that championship, kicked off on May 2, 1909 and ended on October 31, 1909. It was organized by LMSA (Liga Metropolitana de Sports Athleticos, or Metropolitan Athletic Sports League). Seven teams participated. Fluminense won the title for the 4th time. No teams were relegated.[1][2]
Updated to match(es) played on October 31, 1909. Source: RSSSF.com Rules for classification: 1) points; 2) goal difference; 3) wins; 4) number of goals scored. Notes:
^Mangueira withdrew from the championship after the end of the first round; all its remaining matches were counted as walkovers.
^Bangu withdrew from the championship after its third match; all its matches were annulled.