[Solved]: How to Remove the Uncategorized Category in WordPress

Step 1: In addition to the default “Uncategorized” category, confirm that you have created at least one other post category. Posts » Categories is where you can view and create categories.

Step 2: Navigate to Settings » Writing

Step 3: Select the desired category from the “Default Post Category” drop-down menu by clicking on it, then click “Save Changes.”

Step 4: Navigate to Posts » Categories
Step 5: You may now just mouse over the “Uncategorized” category and select the red “Delete” option.

Step 6: To confirm the removal of “Uncategorized,” click the “OK” button.