Ever wondered how to remove the “uncategorized” category in WordPress? If you don’t use it, it is very annoying and can take up unnecessary (if not critical) space in your navigation. Luckily, it is quite simple to remove it if you know the process… in fact, you just might smack your forehead (like I did) when you realize how obvious it is.
Step 1: Change the Default Category for Posts
a) Log in to WordPress and in the left-hand menu go to “Settings > Writing”
b) Scroll down the resulting page and change the “Default Post Category” from “Uncategorized” to another category.

c) At the bottom of the page press “Save Changes”
Step 2: Delete the Uncategorized Category
a) In the left-hand menu go to “Posts > Categories”
b) On the resulting page, scroll over the “Uncategorized” category and you will see 3 options appear including “Delete”.

c) Delete the category
Voila! You are done and you now no longer need to be inconvenienced by the “Uncategorized” category.
I hope that helps… and you didn’t leave a mark on your forehead
Thanks for share this information ,quick and easy step
help me !
i cant hide or remove my uncategorized category in menu…
I Don’t Believe It. I Mean I Just Don’t F**king Believe How Simple That Was. Here I Am Trying To Edit php Files & It’s Right There In Front Of Yer Damn Face! ARRRGGG!! You Deserve A Medal Or A BJ From Jessica Alba Er Somethin’… THANK YOU.
geeeezzz… (smack!)
thanks for tip, I deleted it.