An eight-member IHSAA-sanctioned athletic located within Clay, Daviess, Greene and Sullivan Counties in Southwest and West Central Indiana. North Central (Farmersburg) joined in 2010 with the folding of the Tri-River Conference. Prior to that time, Clay City, Linton Stockton, Shakamak, and also participated in the Tri-River Conference concurrently while playing in the SWIAC. The conference was originally formed in 1939, but information on early membership between then and 1958 is incomplete.