Can you sue for defamation of character if a person told people in the workplace you sexually harassed her and it was not true?

Yes, you can potentially sue for defamation of character if someone spreads false information about you that harms your reputation. To prove defamation, you would need to show that the statement was false, that it was communicated to a third party, and that it resulted in damages to your reputation or livelihood. It's important to consult with a lawyer to discuss your specific situation and determine the best course of action.