In the DC Universe, there are a few characters who are often considered to have higher IQs than Batman.
One of them is Lex Luthor, who is a genius-level intellect and also one of the smartest people in the world. Other characters who are often considered to have higher IQs than Batman include Brainiac, Mister Terrific, and Oracle. However, it's important to note that intelligence is difficult to quantify and there are many different types of intelligence, so it's hard to say for certain who is definitively smarter than Batman.