The 1900 college baseball season, play of college baseball in the United States began in the spring of 1900. Play largely consisted of regional matchups, some organized by conferences, and ended in June. No national championship event was held until 1947.

• Elon, Idaho, and Northern Illinois played their first varsity seasons.

This is a partial list of conference champions from the 1900 season.

The following is an incomplete list of conference standings: