What is Mischa Barton's Net Worth and Salary? Mischa Barton is an actress with British, American, and Irish citizenship who has a net worth of $2.5 million. Mischa Barton is best known for her role as Marissa Cooper on the popular Fox teen drama "The O.C." (2003–2006), a role which would inspire "Entertainment Weekly" to name her 2003's "It Girl." In 2013, she graced the cover of "People" ma...