There are a total of 11 movies in the Harry Potter franchise, including 8 films based on the books and 3 Fantastic Beasts prequels). The Harry Potter movies can be watched in either chronological order or by release date. Here are the two orders:

Chronological Order:

1. Fantastic Beasts and Where to Find Them (2016)
2. Fantastic Beasts: The Crimes of Grindelwald (2018)
3. Harry Potter and the Philosophers Stone (2001)
4. Harry Potter and the Chamber of Secrets (2002)
5. Harry Potter and the Prisoner of Azkaban (2004)
6. Harry Potter and the Goblet of Fire (2005)
7. Harry Potter and the Order of the Phoenix (2007)
8. Harry Potter and the Half-Blood Prince (2009)
9. Harry Potter and the Deathly Hallows: Part 1 (2010)
10. Harry Potter and the Deathly Hallows: Part 2 (2011)

Release Order:

1. Harry Potter and the Philosophers Stone (2001)
2. Harry Potter and the Chamber of Secrets (2002)
3. Harry Potter and the Prisoner of Azkaban (2004)
4. Harry Potter and the Goblet of Fire (2005)
5. Harry Potter and the Order of the Phoenix (2007)
6. Harry Potter and the Half-Blood Prince (2009)
7. Harry Potter and the Deathly Hallows: Part 1 (2010)
8. Harry Potter and the Deathly Hallows: Part 2 (2011)
9. Fantastic Beasts and Where to Find Them (2016)
10. Fantastic Beasts: The Crimes of Grindelwald (2018)

Its worth noting that the Fantastic Beasts movies are set 70 years before the events of the Harry Potter series.