IO

Yes, IO is a Scrabble word!

Letter values in Scrabble US: I 1, O 1.I 1 · O 1

Is it a valid word?

• Scrabble US: not a valid word.Scrabble USYour dictionary · Change (go to the dictionary switch)Not a valid word
• Scrabble UK: valid, 2 points. Make Scrabble UK your dictionary.Scrabble UKYour dictionary · ChangeValid · 2 points
• Words with Friends: not a valid word. Make Words with Friends your dictionary.Words with FriendsYour dictionary · ChangeNot a valid word