Note the two Catholic schools in Ohio (and I'm sure there are more):
ST IGNATIUS BOYS HIGH SCHOOL
ST XAVIER HIGH SCHOOL
GROUP URGES PARENTS TO KEEP KIDS HOME THAT DAY
http://www.notourkids.com/032707PR.html
http://www.notourkids.com/032707PR.html
http://www.notourkids.com/032707PR.html
http://www.notourkids.com/032707PR.html
Wisconsin
MARQUETTE UNIVERSITY HIGH SCHOOL
MEMORIAL HS
PIUS XI HIGH SCHOOL
Yes. There are two from my area, St. Xavier and Ursuline are both Catholic. Thankfully, my high school, run by nuns, is not on the list. However, I see a lot of our local schools on the list. (BARF)
And there's a couple in WI:
Marquette University High School
Pius XI High School
(both in the Archdiocese of Milwaukee)