Please provide the chemical formula or compound you're asking about. The oxidation state of bromine can vary depending on the compound it's in.

For example:

* In Br₂ (bromine element): The oxidation state of each bromine atom is 0.

* In HBr (hydrogen bromide): Bromine has an oxidation state of -1.

* In BrO₃⁻ (bromate ion): Bromine has an oxidation state of +5.

Let me know the compound and I can tell you the oxidation state of bromine in it.