Pennywise from IT
Being the horror researcher that I am, I decided to compile a list of movies featuring killer clowns. There's probably some here that you've never heard of before. A few of them are good (You'll already know which ones), but most, not so much.

Not listed in any particular order, except for the first few being the more familiar ones.

0. Poltergeist (1982)

1. Stephen King's It (1990)

2. Clownhouse (1990)

3. Killer Klowns From Outer Space (1988)

4. Drive Thru (2008)

5. Amusement (2009)

6. Gacy (2002)

7. House of 1,000 Corpses (2003)

8. The Clown at Midnight (1998)

9. Dead Clowns (2008)

10. 100 Tears (2008)

11. Mr. Halloween (2007)

12. Camp Blood trilogy (1999, 2000, 2005)

13. Purvos (2008)

14. Mr. Jingles (2006), Jingles the Clown (2009)

15. Killjoy trilogy (2000, 2003,2011)

16. S.I.C.K (2005)

17. We All Scream For Ice Cream (2007)

18. Fear of Clowns 1 & 2 (2004, 2008)

19. Secrets of the Clown (2007)

20. The Fun Park (2008)

21. Night of the Clown (1998)

22. Evil Night (1995)

23. Final Draft (2007)
Clown from the movie, Amusement