Herbert Garrison (previously Janet Garrison; after a sex-change operation that was later reversed), is a 4th grade teacher at South Park Elementary. He first appears in the Season One episode, "Cartman Gets an Anal Probe", and is voiced by Trey Parker. Mr. Garrison was a man throughout the first nine seasons of South Park until "Mr. Garrison's Fancy New Vagina", where he received gender confirmation surgery and became a woman. This was undone in "Eek, A Penis!", where he got a reverse sex change operation and became male once again. He ran for President in Season Nineteen, eventually gaining the Republican nomination. He became elected as President of the United States in the Season Twenty episode "Oh, Jeez" and appears as the 45th President of the United States from Seasons Twenty-One to Twenty-Three. However, in the Season Twenty-Four episode "South ParQ Vaccination Special", he returned to South Park to continue his work as a 4th grade teacher.

(Note: If casted you will also be voicing Mr. Hat)

VA - Trey Parker