I'm not youth anymore, but for those interested in the Midwest there is:

JTBA Ohio
MJMA Michigan
OYBT Ohio
IYSBT Indiana
Junior Masters in Dayton, OH
Columbus Youth Masters in Columbus, OH (which is this coming weekend I do believe)
Dug Barker's Louisville, KY Junior Gold tournaments
Cincinnati, OH has a few tournaments a year
Midwest Tournaments in Dayton OH. Adult-Junior and Premier JOG Tournament

And I think I am missing a few.