How Do I Find the Category ID of a WordPress Post?

Category IDs are a bit of an odd beast in WordPress. They’re technically a part of the post data, but they’re not easy to find or use.

Thankfully, there’s a pretty straightforward way to find them.

To find the category ID of a post, you can use the wp_get_post_category function. This function takes in a post ID as its only argument, and it’ll return the corresponding category ID.

If you need to find the category for a post without using the function, you can use the get_the_category function. This function takes in an arbitrary post ID as its only argument, and it’ll return the category for that post.