| Adams County | 2 | 4,122 | Adams County Ohio Valley Local, Manchester Local |
| Allen County | 8 | 13,193 | Lima City, Shawnee Local, Elida Local, Bath Local, Bluffton Exempted Village, Allen East Local, Spencerville Local, Perry Local |
| Ashland County | 5 | 6,420 | Ashland City, Black River Local, Hillsdale Local, Loudonville-Perrysville Exempted Village, Mapleton Local |
| Ashtabula County | 7 | 11,407 | Ashtabula Area City, Geneva Area City, Jefferson Area Local, Buckeye Local, Conneaut Area City, Pymatuning Valley Local School District, Grand Valley Local |
| Athens County | 5 | 6,090 | Athens City School District, Alexander Local, Nelsonville-York City, Federal Hocking Local, Trimble Local |
| Auglaize County | 6 | 7,371 | Wapakoneta City, St Marys City, Minster Local, New Bremen Local, Waynesfield-Goshen Local, New Knoxville Local |
| Belmont County | 7 | 8,075 | St Clairsville-Richland City, Barnesville Exempted Village, Martins Ferry City, Union Local, Bellaire Local, Bridgeport Exempted Village, Shadyside Local |
| Brown County | 5 | 6,046 | Western Brown Local, Eastern Local School District, Georgetown Exempted Village, Fayetteville-Perry Local, Ripley-Union-Lewis-Huntington Local |
| Butler County | 10 | 56,244 | Lakota Local, Fairfield City, Hamilton City, Middletown City, Edgewood City School District, Monroe Local, Talawanda City, Ross Local, Madison Local, New Miami Local |
| Carroll County | 3 | 2,824 | Carrollton Exempted Village, Brown Local, Conotton Valley Union Local |
| Champaign County | 5 | 6,135 | Urbana City, Graham Local, West Liberty-Salem Local, Mechanicsburg Exempted Village, Triad Local |
| Clark County | 8 | 19,049 | Springfield City School District, Northeastern Local, Tecumseh Local, Northwestern Local, Clark-Shawnee Local, Greenon Local, Global Impact STEM Academy, Southeastern Local |
| Clermont County | 9 | 24,865 | West Clermont Local, Milford Exempted Village, Goshen Local, Batavia Local, New Richmond Exempted Village, Bethel-Tate Local, Clermont Northeastern Local, Williamsburg Local, Felicity-Franklin Local |
| Clinton County | 4 | 6,068 | Wilmington City, Clinton-Massie Local, East Clinton Local, Blanchester Local |
| Columbiana County | 11 | 12,243 | All 11 Columbiana County districts → |
| Coshocton County | 3 | 4,287 | River View Local, Coshocton City, Ridgewood Local |
| Crawford County | 6 | 5,870 | Galion City, Wynford Local, Bucyrus City, Colonel Crawford Local, Buckeye Central Local, Crestline Exempted Village |
| Cuyahoga County | 31 | 128,545 | All 31 Cuyahoga County districts → |
| Darke County | 8 | 7,993 | Greenville City, Versailles Exempted Village, Arcanum-Butler Local, Tri-Village Local, Ansonia Local, Mississinawa Valley Local, Franklin Monroe Local, Bradford Exempted Village |
| Defiance County | 5 | 5,682 | Defiance City, Northeastern Local, Central Local, Hicksville Exempted Village School District, Ayersville Local |
| Delaware County | 4 | 36,379 | Olentangy Local, Delaware City, Big Walnut Local, Buckeye Valley Local Schools |
| Erie County | 7 | 10,193 | Sandusky City, Perkins Local, Vermilion Local, Edison Local (formerly Berlin-Milan), Huron City Schools, Margaretta Local, Kelleys Island Local |
| Fairfield County | 8 | 26,136 | Pickerington Local, Lancaster City, Bloom-Carroll Local, Fairfield Union Local, Amanda-Clearcreek Local, Liberty Union-Thurston Local, Berne Union Local, Walnut Township Local |
| Fayette County | 2 | 4,322 | Miami Trace Local, Washington Court House City |
| Franklin County | 17 | 175,484 | All 17 Franklin County districts → |
| Fulton County | 7 | 6,935 | Wauseon Exempted Village, Evergreen Local, Archbold-Area Local, Swanton Local, Pike-Delta-York Local, Pettisville Local, Fayette Local |
| Gallia County | 2 | 3,962 | Gallia County Local, Gallipolis City |
| Geauga County | 5 | 9,055 | Kenston Local, Chardon Local, West Geauga Local, Berkshire Local, Cardinal Local |
| Greene County | 8 | 21,367 | Beavercreek City, Fairborn City, Xenia Community City, Bellbrook-Sugarcreek Local, Greeneview Local, Yellow Springs Exempted Village, Cedar Cliff Local, Community STE(A)M Academy - Xenia |
| Guernsey County | 3 | 4,275 | Cambridge City, Rolling Hills Local, East Guernsey Local |
| Hamilton County | 22 | 101,332 | All 22 Hamilton County districts → |
| Hancock County | 9 | 11,745 | Findlay City, Liberty-Benton Local, Van Buren Local, Riverdale Local, Arlington Local, McComb Local, Arcadia Local, Cory-Rawson Local, Vanlue Local |
| Hardin County | 5 | 4,021 | Kenton City, Ada Exempted Village, Upper Scioto Valley Local, Ridgemont Local, Hardin Northern Local |
| Harrison County | 1 | 1,319 | Harrison Hills City |
| Henry County | 4 | 3,932 | Napoleon Area City, Liberty Center Local, Patrick Henry Local, Holgate Local |
| Highland County | 5 | 6,670 | Hillsboro City, Greenfield Exempted Village, Lynchburg-Clay Local, Fairfield Local, Bright Local |
| Hocking County | 1 | 3,364 | Logan-Hocking Local |
| Holmes County | 2 | 3,166 | West Holmes Local, East Holmes Local |
| Huron County | 8 | 9,052 | Norwalk City, Bellevue City, Willard City, Western Reserve Local, New London Local, South Central Local, Plymouth-Shiloh Local, Monroeville Local |
| Jackson County | 3 | 4,600 | Jackson City, Wellston City, Oak Hill Union Local |
| Jefferson County | 5 | 8,297 | Steubenville City, Indian Creek Local, Edison Local, Buckeye Local, Toronto City |
| Knox County | 5 | 6,920 | Mount Vernon City, Fredericktown Local, Centerburg Local, East Knox Local, Danville Local |
| Lake County | 10 | 27,722 | Mentor Exempted Village, Willoughby-Eastlake City, Riverside Local, Painesville City Local, Madison Local, Perry Local, Wickliffe City, Kirtland Local, Fairport Harbor Exempted Village, iSTEM |
| Lawrence County | 8 | 8,411 | Rock Hill Local, South Point Local, Fairland Local, Ironton City School District, Chesapeake Union Exempted Village, Dawson-Bryant Local, Symmes Valley Local, Tri-State STEM+M School |
| Licking County | 10 | 28,094 | All 10 Licking County districts → |
| Logan County | 4 | 5,771 | Bellefontaine City, Benjamin Logan Local, Indian Lake Local, Riverside Local |
| Lorain County | 14 | 38,581 | All 14 Lorain County districts → |
| Lucas County | 8 | 49,448 | Toledo City, Sylvania Schools, Washington Local, Anthony Wayne Local, Oregon City, Springfield Local, Maumee City, Ottawa Hills Local |
| Madison County | 4 | 6,621 | Jonathan Alder Local, London City, Madison-Plains Local, Jefferson Local |
| Mahoning County | 15 | 25,186 | All 15 Mahoning County districts → |
| Marion County | 5 | 8,769 | Marion City, River Valley Local, Pleasant Local, Elgin Local, Ridgedale Local |
| Medina County | 6 | 23,850 | Brunswick City, Medina City SD, Wadsworth City, Highland Local, Cloverleaf Local, Buckeye Local |
| Meigs County | 3 | 2,988 | Meigs Local, Eastern Local, Southern Local |
| Mercer County | 6 | 8,363 | Celina City, Coldwater Exempted Village, St Henry Consolidated Local, Marion Local, Fort Recovery Local, Parkway Local |
| Miami County | 8 | 15,421 | Troy City, Piqua City, Tipp City Exempted Village, Bethel Local, Milton-Union Exempted Village, Miami East Local, Covington Exempted Village, Newton Local |
| Monroe County | 1 | 1,883 | Switzerland of Ohio Local |
| Montgomery County | 17 | 65,463 | All 17 Montgomery County districts → |
| Morgan County | 1 | 1,601 | Morgan Local |
| Morrow County | 4 | 4,579 | Highland Local, Northmor Local, Mount Gilead Exempted Village, Cardington-Lincoln Local |
| Muskingum County | 6 | 13,063 | Zanesville City, Tri-Valley Local, East Muskingum Local, Franklin Local, Maysville Local, West Muskingum Local |
| Noble County | 2 | 1,797 | Noble Local, Caldwell Exempted Village |
| Ottawa County | 8 | 5,580 | Port Clinton City, Benton Carroll Salem Local, Genoa Area Local, Woodmore Local, Danbury Local, Put-In-Bay Local, Middle Bass Local, North Bass Local |
| Paulding County | 3 | 2,855 | Paulding Exempted Village, Wayne Trace Local, Antwerp Local |
| Perry County | 4 | 5,578 | Northern Local, New Lexington School District, Crooksville Exempted Village, Southern Local |
| Pickaway County | 4 | 9,710 | Teays Valley Local, Circleville City, Logan Elm Local, Westfall Local |
| Pike County | 4 | 4,166 | Waverly City, Scioto Valley Local, Eastern Local School District, Western Local |
| Portage County | 13 | 19,599 | All 13 Portage County districts → |
| Preble County | 6 | 5,537 | Eaton Community City, Preble Shawnee Local, National Trail Local, Twin Valley Community Local, Tri-County North Local, College Corner Local |
| Putnam County | 9 | 5,938 | Ottawa-Glandorf Local, Columbus Grove Local, Leipsic Local, Miller City-New Cleveland Local, Kalida Local, Pandora-Gilboa Local, Continental Local, Ottoville Local, Jennings Local |
| Richland County | 8 | 14,300 | Mansfield City, Madison Local, Lexington Local, Ontario Local, Shelby City, Clear Fork Valley Local, Crestview Local, Lucas Local |
| Ross County | 7 | 9,615 | Chillicothe City, Union-Scioto Local, Zane Trace Local, Adena Local, Huntington Local, Southeastern Local, Paint Valley Local |
| Sandusky County | 4 | 6,946 | Fremont City, Clyde-Green Springs Exempted Village, Lakota Local, Gibsonburg Exempted Village |
| Scioto County | 10 | 9,927 | Wheelersburg Local, Portsmouth City, Washington-Nile Local, Minford Local, Northwest Local, Valley Local, Bloom-Vernon Local, Clay Local, Green Local, New Boston Local |
| Seneca County | 5 | 5,057 | Tiffin City Schools, Seneca East Local, Hopewell-Loudon Local, Old Fort Local, New Riegel Local |
| Shelby County | 8 | 7,812 | Sidney City, Anna Local, Fort Loramie Local, Hardin-Houston Local, Botkins Local, Jackson Center Local, Fairlawn Local, Russia Local |
| Stark County | 16 | 51,290 | All 16 Stark County districts → |
| Summit County | 16 | 64,518 | All 16 Summit County districts → |
| Trumbull County | 20 | 23,406 | All 20 Trumbull County districts → |
| Tuscarawas County | 9 | 13,492 | New Philadelphia City, Dover City, Indian Valley Local, Claymont City, Sandy Valley Local, Tuscarawas Valley Local, Garaway Local, Newcomerstown Exempted Village, Strasburg-Franklin Local |
| Union County | 3 | 8,224 | Marysville Exempted Village, North Union Local School District, Fairbanks Local |
| Van Wert County | 4 | 4,617 | Van Wert City, Delphos City, Crestview Local, Lincolnview Local |
| Vinton County | 1 | 1,656 | Vinton County Local |
| Warren County | 8 | 38,020 | Mason City, Springboro Community City, Little Miami Local, Lebanon City, Kings Local, Franklin City, Wayne Local, Carlisle Local |
| Washington County | 6 | 6,961 | Marietta City, Warren Local, Belpre City, Fort Frye Local, Wolf Creek Local, Frontier Local |
| Wayne County | 10 | 13,601 | All 10 Wayne County districts → |
| Williams County | 7 | 4,964 | Bryan City, Montpelier Exempted Village, Edon Northwest Local, North Central Local, Edgerton Local, Millcreek-West Unity Local, Stryker Local |
| Wood County | 10 | 18,698 | All 10 Wood County districts → |
| Wyandot County | 3 | 3,289 | Upper Sandusky Exempted Village, Mohawk Local, Carey Exempted Village Schools |
