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In most cases the county government is located in the courthouse.
This is where you will find vital records, such as birth, marriage and death.
Typically this is also the home to the assessor and the clerk, where you will find property records.
Circuit clerks are keepers of court records, criminal and civil.
The courthouse is also where you typically find the county prosecutor and the sheriff, who collects property taxes.
Population statistics are from the 2002 post-census survey.
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Adams (County) 110 W Main St West Union, OH 45693 Population: 28,093 Map |
Allen (County) P. O. Box 1243 Lima, OH 45801 Population: 108,440 Map Near: Lima, Oh |
Ashland (County) 110 Cottage Street Ashland, OH 44805 Population: 51,372 Map |
Ashtabula (County) 25 West Jefferson Jefferson, OH 44047 Population: 102,207 Map Near: Cleveland-lorian-elyria, Oh |
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Athens (County) 15 South Court Street, Room 330 Athens, OH 45701 Population: 61,162 Map |
Auglaize (County) P. O. Box 330 Wapakoneta, OH 45895 Population: 47,059 Map Near: Lima, Oh |
Belmont (County) 101 W Main County Courthouse St Clairsville, OH 43950 Population: 70,022 Map Near: Wheeling, Wv-oh |
Brown (County) 800 Mt Orab Pike Georgetown, OH 45121 Population: 39,358 Map Near: Cincinnati-hamilton, Oh-ky-in |
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Butler (County) 130 High St Hamilton, OH 45011 Population: 323,579 Map Near: Hamilton-middletown, Oh |
Carroll (County) 119 Public Square Carrollton, OH 44615 Population: 28,522 Map Near: Canton-massillon, Oh |
Champaign (County) 200 North Main St Urbana, OH 43078 Population: 37,910 Map |
Clark (County) 31n Limestone Street Springfield, OH 45502 Population: 147,472 Map Near: Dayton-springfield, Oh |
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Clermont (County) 76 S Riverside Dr Batavia, OH 45103 Population: 169,670 Map Near: Cincinnati-hamilton, Oh-ky-in |
Clinton (County) 46 South Street Wilmington, OH 45177 Population: 38,645 Map |
Columbiana (County) 105 S Market St Lisbon, OH 44432 Population: 111,406 Map Near: Youngstown-warren, Oh |
Coshocton (County) 349 Main Street Coshocton, OH 43812 Population: 36,131 Map |
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Crawford (County) P O Box 150 Bucyrus, OH 44820 Population: 47,290 Map Near: Mansfield, Oh |
Cuyahoga (County) County Building Room 432 1219 Ontario Street Cleveland, OH 44113 Population: 1,401,552 Map Near: Cleveland-lorian-elyria, Oh |
Darke (County) 520 South Broadway Street Greenville, OH 45331 Population: 54,259 Map |
Defiance (County) 221 Clinton Street Defiance, OH 43512 Population: 40,059 Map |
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Delaware (County) 91 N Sandusky St Delaware, OH 43015 Population: 83,245 Map Near: Columbus, Oh |
Erie (County) P O Box 1180 Sandusky, OH 44870 Population: 78,913 Map |
Fairfield (County) 210 East Main St Courthouse Lancaster, OH 43130 Population: 119,182 Map Near: Columbus, Oh |
Fayette (County) General Delivery Washington, OH 43160 Population: 28,395 Map |
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Franklin (County) 373 S High Street Columbus, OH 43215 Population: 1,013,724 Map Near: Columbus, Oh |
Fulton (County) 125 Courthouse Plaza Wauseon, OH 43567 Population: 41,180 Map Near: Toledo, Oh |
Gallia (County) 18 Locust Street Gallipolis, OH 45631 Population: 32,820 Map |
Geauga (County) Courthouse Annex Chardon, OH 44024 Population: 86,054 Map Near: Cleveland-lorian-elyria, Oh |
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Greene (County) 69 Greene Street Xenia, OH 45385 Population: 139,936 Map Near: Dayton-springfield, Oh |
Guernsey (County) Guernsey County Court House Wheeling Avenue Cambridge, OH 43725 Population: 40,509 Map |
Hamilton (County) County Courthouse Rm 504 Cincinnati, OH 45202 Population: 857,616 Map Near: Cincinnati-hamilton, Oh-ky-in |
Hancock (County) 300 S Main Street Findlay, OH 45840 Population: 68,562 Map |
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Hardin (County) 1 Courthouse Square Suite 250 Kenton, OH 43326 Population: 31,629 Map |
Harrison (County) 100 West Market Street Cadiz, OH 43907 Population: 16,001 Map |
Henry (County) P. O. Box 546 Napoleon, OH 43545 Population: 29,901 Map |
Highland (County) Box 822 Hillsboro, OH 45133 Population: 39,388 Map |
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Hocking (County) 1 East Main Street Logan, OH 43138 Population: 28,413 Map |
Holmes (County) 34d South Clay Millersburg, OH 44654 Population: 36,786 Map |
Huron (County) 2 East Main Street Norwalk, OH 44857 Population: 59,563 Map |
Jackson (County) 226 E. Main Street Jackson, OH 45640 Population: 32,352 Map |
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Jefferson (County) P. O. Box 159 Steubenville, OH 43952 Population: 77,037 Map Near: Steubenville-weirton, Pa |
Knox (County) 106 East High Street Mount Vernon, OH 43050 Population: 51,702 Map |
Lake (County) P. O. Box 490 Painesville, OH 44077 Population: 223,301 Map Near: Cleveland-lorian-elyria, Oh |
Lawrence (County) 111 South 4th Street Ironton, OH 45638 Population: 64,258 Map Near: Huntington-ashland, Wv-ky-oh |
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Licking (County) 20 South Second Street Newark, OH 43055 Population: 137,584 Map Near: Columbus, Oh |
Logan (County) 100 S Madriver St Bellefontaine, OH 43311 Population: 45,606 Map |
Lorain (County) 226 Middle Avenue Elyria, OH 44035 Population: 281,231 Map Near: Cleveland-lorian-elyria, Oh |
Lucas (County) Government Ctr Suite 600 Toledo, OH 43604 Population: 452,691 Map Near: Toledo, Oh |
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Madison (County) P.o. Box 618 London, OH 43140 Population: 41,184 Map Near: Columbus, Oh |
Mahoning (County) 120 Market St Youngstown, OH 44503 Population: 260,107 Map Near: Youngstown-warren, Oh |
Marion (County) 110 North Main Street Marion, OH 43302 Population: 65,323 Map |
Medina (County) 144 N Broadway St Medina, OH 44256 Population: 138,943 Map Near: Cleveland-lorian-elyria, Oh |
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Meigs (County) County Courhouse, 2nd Street Pomeroy, OH 45769 Population: 23,938 Map |
Mercer (County) 101 N Main Street, Room 107 Celina, OH 45822 Population: 40,890 Map |
Miami (County) 201 W Main Street Troy, OH 45373 Population: 96,941 Map Near: Dayton-springfield, Oh |
Monroe (County) 101 N Main St Rm 22 Woodsfield, OH 43793 Population: 15,268 Map |
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Montgomery (County) 451 W 3rd Street Dayton, OH 45422 Population: 566,312 Map Near: Dayton-springfield, Oh |
Morgan (County) 19 E Main Street Mcconnelsville, OH 43756 Population: 14,599 Map |
Morrow (County) 48 E High Mount Gilead, OH 43338 Population: 30,481 Map |
Muskingum (County) 401 Main Street Zanesville, OH 43701 Population: 84,349 Map |
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Noble (County) 200 Courthouse Caldwell, OH 43724 Population: 12,134 Map |
Ottawa (County) 315 Madison Street Port Clinton, OH 43452 Population: 40,535 Map |
Paulding (County) County Courthouse Paulding, OH 45879 Population: 20,344 Map |
Perry (County) P. O. Box 127 New Lexington, OH 43764 Population: 33,834 Map |
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Pickaway (County) County Courthouse Circleville, OH 43113 Population: 52,727 Map Near: Columbus, Oh |
Pike (County) 100 E 2nd Waverly, OH 45690 Population: 27,156 Map |
Portage (County) 449 S Meridian St Ravenna, OH 44266 Population: 149,571 Map Near: Akron, Oh |
Preble (County) 100 E Main Street Eaton, OH 45320 Population: 42,633 Map |
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Putnam (County) 245 E. Main St., P. O. Box 345 Ottawa, OH 45875 Population: 35,199 Map |
Richland (County) 50 Park Ave East Mansfield, OH 44902 Population: 128,151 Map Near: Mansfield, Oh |
Ross (County) Courthouse Chillicothe, OH 45601 Population: 74,407 Map |
Sandusky (County) 100 N Park Avenue Fremont, OH 43420 Population: 62,732 Map |
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Scioto (County) 602 7th Street Portsmouth, OH 45662 Population: 80,905 Map |
Seneca (County) 103 S Washington Tiffin, OH 44883 Population: 60,368 Map |
Shelby (County) 129 E Court Street Sidney, OH 45365 Population: 46,837 Map |
Stark (County) 200 W Tuscarawas Canton, OH 44702 Population: 374,406 Map Near: Canton-massillon, Oh |
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Summit (County) 175 S Main Street Akron, OH 44309 Population: 530,571 Map Near: Akron, Oh |
Trumbull (County) 160 High St Nw Warren, OH 44481 Population: 227,069 Map Near: Youngstown-warren, Oh |
Tuscarawas (County) P. O. Box 551 New Phila, OH 44663 Population: 87,803 Map |
Union (County) 233 W 6th Street Marysville, OH 43040 Population: 37,396 Map |
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Van Wert (County) 121 E Main Street Van Wert, OH 45891 Population: 30,426 Map |
Vinton (County) 100 E Main Street Mcarthur, OH 45651 Population: 12,068 Map |
Warren (County) 320 E Silver Street Lebanon, OH 45036 Population: 134,791 Map Near: Cincinnati-hamilton, Oh-ky-in |
Washington (County) 205 Putnam Street Marietta, OH 45750 Population: 63,827 Map Near: Parkersburg-marietta, Wv-oh |
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Wayne (County) 428 West Liberty St Wooster, OH 44691 Population: 108,556 Map |
Williams (County) 1 Courthouse Square Bryan, OH 43506 Population: 37,950 Map |
Wood (County) #1 Courthouse Square Bowling Green, OH 43402 Population: 117,546 Map Near: Toledo, Oh |
Wyandot (County) 109 S Sandusky Avenue Upper Sandusky, OH 43351 Population: 22,718 Map |
