Mckinley High School
The Glee students attend William McKinley High School.
The kids from Glee LOL
If you're talking about the TV show Glee, then the answer is William McKinley High.
Freaks and geeks. And glee
The New Directions :)
Assuming that you mean the one that is on the TV show Glee, William McKinley High School is a fictional high school. Although the show states that the school is located in Lima, Ohio, there are no high schools in Lima, Ohio that go by "William McKinley". In other words, it does not exist. In fact, the sets for William McKinley (and all of Glee) are located in LA. They comprise of 5 sets.
He goes to Dalton Academy in the 2nd season of Glee. But he later transfers to Mckinley High School to be with his boyfriend Kurt <3
Glee is filmed primarily at Paramount Studios in Los Angeles, CA, with cafeteria, outside hallway and football field scenes at Juan Rodriguez Cabrillo High School in Long Beach and gym scenes at Helen Bernstein High School in Los Angeles.
The William McKinley High School Glee Club is called New Directions! :0)
Ohio
In episode 11 of season 1, called Hairography, the Glee club from the Deaf School visited McKinley High School and the two Glee clubs performed together, singing Imagine, by John Lennon.