Adams County (1797 - Present)
Allen County (1820 - Present)
Ashland County (1846 - Present)
Ashtabula County (1808 - Present)
Athens County (1805 - Present)
Auglaize County (1848 - Present)
Belmont County (1801 - Present)
Brown County (1818 - Present)
Butler County (1803 - Present)
Carroll County (1833 - Present)
Champaign County (1805 - Present)
Clark County (1818 - Present)
Clermont County (1800 - Present)
Clinton County (1810 - Present)
Columbiana County (1803 - Present)
Coshocton County (1810 - Present)
Crawford County (1820 - Present)
Cuyahoga County (1808 - Present)
Darke County (1809 - Present)
Defiance County (1845 - Present)
Delaware County (1808 - Present)
Erie County (1838 - Present)
Fairfield County (1800 - Present)
Fayette County (1810 - Present)
Franklin County (1803 - Present)
Fulton County (1850 - Present)
Gallia County (1803 - Present)
Geauga County (1806 - Present)
Greene County (1803 - Present)
Guernsey County (1810 - Present)
Hamilton County (1790 - Present)
Hancock County (1820 - Present)
Hardin County (1820 - Present)
Harrison County (1813 - Present)
Henry County (1820 - Present)
Highland County (1805 - Present)
Hocking County (1818 - Present)
Holmes County (1824 - Present)
Huron County (1809 - Present)
Jackson County (1816 - Present)
Jefferson County (1797 - Present)
Knox County (1808 - Present)
Lake County (1840 - Present)
Lawrence County (1815 - Present)
Licking County (1808 - Present)
Logan County (1818 - Present)
Lorain County (1822 - Present)
Lucas County (1835 - Present)
Madison County (1810 - Present)
Mahoning County (1846 - Present)
Marion County (1820 - Present)
Medina County (1812 - Present)
Meigs County (1819 - Present)
Mercer County (1820 - Present)
Miami County (1807 - Present)
Monroe County (1813 - Present)
Montgomery County (1803 - Present)
Morgan County (1817 - Present)
Morrow County (1848 - Present)
Muskingum County (1804 - Present)
Noble County (1851 - Present)
Ottawa County (1840 - Present)
Paulding County (1820 - Present)
Perry County (1818 - Present)
Pickaway County (1810 - Present)
Pike County (1815 - Present)
Portage County (1808 - Present)
Preble County (1808 - Present)
Putnam County (1820 - Present)
Richland County (1808 - Present)
Ross County (1798 - Present)
Sandusky County (1820 - Present)
Scioto County (1803 - Present)
Seneca County (1820 - Present)
Shelby County (1819 - Present)
Stark County (1808 - Present)
Summit County (1840 - Present)
Trumbull County (1800 - Present)
Tuscarawas County (1808 - Present)
Union County (1820 - Present)
Van Wert County (1820 - Present)
Vinton County (1850 - Present)
Warren County (1803 - Present)
Washington County (1788 - Present)
Wayne County (1808 - Present)
Williams County (1820 - Present)
Wood County (1820 - Present)
Wyandot County (1845 - Present)