South Park has hundreds of episodes, 257 episodes across 18 seasons to be exact. Many are good (And I mean MANY) and it's my favourite show. However, if I had to reduce it to 10 episodes, these are the ones I'd re-watch continuously.
9. 200 and 201
8. Kenny Dies
6. Super Best Friends
4. The Poor Kid
3. The Return of Chef:
One of my favourite episodes, due to it being the end of Chef, due to him dying of a stroke. They made his lines through the use of other lines he had spoken throughout the series (Because of an earlier episode involving Scientology (Trapped In The Closet), which was his voice actor's (Isaac Hayes) religion; This episode made him quit the series).
2. Scott Tenorman Must Die:
One of the darkest episodes, this episode really shows the evil ways Cartman gets revenge. No spoilers, watch it until the end. You won't regret it.
1. (THE BEST) The Superhero Arc (Coon 2: Hindsight, Mysterion Rises, and Coon vs. Coon and Friends):
3 episodes, but reveals a lot of things, such as why Kenny dies alot but no one remembers, why The Coon was abandoned and, also, Kenny's voice. Thats good enough for me.
Worst Episodes: Top 10 Worst South Park Episodes
List by Skepolo