Marion County was once part of:
• Old Craven County (1682-1769)
• Anglican Parishes of Prince Frederick (1734) and Prince George (1729)
• 1769-1785 Georgetown District
• 1785-c.1798 Liberty County of Marion District (Liberty is used on 1800 federal census)
• 1798-1868 Marion District
• 1869-1909 Marion County
• 1910 Dillon County was carved from Upper Marion County
Rhesa Oliver lived in the part of Marion Co. that was in Prince Georges Parish