Gumboro is a small unincorporated community in Sussex County, Delaware, United States. It is part of the Salisbury, Maryland-Delaware Metropolitan Statistical Area. In 2006 legislation to establish Gumboro as an incorporated town was passed by the Delaware General Assembly, but was vetoed by Governor Ruth Ann Minner as no civic government was to be immediately convened, leaving a gap in government from when the town was incorporated and left county control, until the election of a government.