The initial round consists of six- and eight-team regionals held at pre-selected sites in eight regions: New England, New York, Mid-Atlantic, South, Mideast, Midwest, Central, and West.

The eight regional champions advance to the final round of the Division III Baseball Championship tournament.

The tournament final will be hosted in Classic Park in Eastlake, Ohio beginning in 2024.

[2] The championship was held in Cedar Rapids four times beginning in 2019 and hosted by the American Rivers Conference.

[3] Cedar Rapids was set to only host until 2022, but was awarded the 2023 championships after 2020 was cancelled due to COVID-19.