There are a total of nine American Pie movies. This includes four original American Pie films and five direct-to-video spin-off movies under the American Pie Presents series. The original American Pie series has these four movies:

1. American Pie (1999)
2. American Pie 2 (2001)
3. American Wedding (2003)
4. American Reunion (2012)

The American Pie Presents spin-off series includes these five movies:

1. American Pie Presents: Band Camp (2005)
2. American Pie Presents: The Naked Mile (2006)
3. American Pie Presents: Beta House (2007)
4. American Pie Presents: The Book of Love (2009)
5. American Pie Presents: Girls’ Rules (2020)

So, counting both the original four films and the five spin-offs, there are nine movies in total in the American Pie franchise.