Indiana State Chess Association (ISCA) is a statewide chess organization based in Indianapolis, Indiana, United States. It serves as Indiana’s recognized US Chess affiliate and supports organized play across the state. Over the years, ISCA has become a trusted tournament organizer for players of all levels.

In addition, ISCA runs a full calendar of US Chess–rated events, leagues, and community programs. It organizes the Indiana Chess Congress and the 85th Indiana State Championship, a premier open chess tournament featuring classical chess and multiple competitive sections. Moreover, ISCA also supports rapid chess, blitz, and scholastic competitions through its broader tournament pipeline.

Furthermore, ISCA helps grow chess through volunteer leadership, fair-play standards, and accessible events for juniors and adults. As a result, many players return each year for consistent organization and strong statewide competition.