The Western Asset Municipal Partners Fund Inc. is a fixed income mutual fund launched and managed by Legg Mason Partners Fund Advisor, LLC and co-managed by Western Asset Management Company, that invests in fixed income markets of the United States. With a primary focus on investment grade tax exempt securities issued by municipalities, the fund benchmarks its performance against the Barclays Municipal Bond Index. It was formerly known as the Salomon Brothers Municipal Partners Fund and was established on January 29, 1993, domiciled in the United States.