The largest high school basketball gyms in the United States refers to gymnasiums primarily used by secondary schools for basketball purposes. 14 of the 16 largest high school gymnasiums are located in the state of Indiana.
In March 2019, The Indianapolis Star reported that the Indiana High School Basketball Historical Society had done research through actual on-site counts, conducting personal interviews, and reviewing architectural blueprints to confirm the accuracy of the list of the largest high school gyms in Indiana. This research confirmed a reordering of the top three sites was necessary, moving Seymour's Lloyd E. Scott Gymnasium to the top spot.[1] The previous #1, New Castle's Fieldhouse, was moved to third. However, when the Fieldhouse was renovated in 2020, its seating capacity was increased from 7,829 to 8,424, enabling New Castle to reclaim the #1 spot.[2]