how many full length home alone movies have there been

There have been 6 full-length Home Alone movies. They are the original two films, plus four later entries in the franchise.

The six films

1. Home Alone (1990)

2. Home Alone 2: Lost in New York (1992)

3. Home Alone 3 (1997)

4. Home Alone 4 (2002)

5. Home Alone: The Holiday Heist (2012)

6. Home Sweet Home Alone (2021)

If you want, I can also list which ones are considered the main Kevin McCallister movies versus the later spin-off-style sequels.