Androscoggin County (1854 - Present)
Aroostook County (1839 - Present)
Cumberland County (1760 - Present)
Franklin County (1838 - Present)
Hancock County (1790 - Present)
Kennebec County (1799 - Present)
Knox County (1860 - Present)
Lincoln County (1760 - Present)
Oxford County (1805 - Present)
Penobscot County (1816 - Present)
Piscataquis County (1838 - Present)
Sagadahoc County (1854 - Present)
Somerset County (1809 - Present)
Waldo County (1827 - Present)
Washington County (1790 - Present)
Yorkshire County (1652 - Present)