William McWillie served as a Representative from Mississippi in the United States Congress from 1849 to 1851. A member of the Democratic Party, William McWillie contributed to the legislative process during 1 term in office.

William McWillie’s service in Congress occurred during a significant period in American history. As a member of the House of Representatives, William McWillie participated in the democratic process and represented the interests of constituents, helping to shape the laws and policies that governed the nation.