Here are some different ways to look at it:
* Officially released theatrical shorts: There are 75 officially released Pixar shorts that have been shown in theaters.
* All Pixar shorts, including those only on home video or Disney+: This number is much larger, with many shorts only released on home video or streaming services. It's hard to get an exact count, but there are hundreds.
* Shorts made by Pixar but not released: Pixar also creates a lot of internal shorts for testing new techniques or showcasing talent, which never get released publicly.
It really depends on what you're interested in!