Ohio's historical markers, on the maps of their own eras

Markers from the Ohio Historical Markers program now have permanent pages at TreeAlive, placing their full inscriptions, both sides where a marker has two, on georeferenced maps from the periods they commemorate.

1,782 marker pages, on more than 84,000 historical map sheets. Ohio Historical Markers program, Ohio History Connection, credited on every page.

Every dot is a live page. Click one to preview it or add it to a road trip; many dots hold several markers each; click a busy spot to zoom in. Prefer a list? Browse all 1,782 markers by county.

Historical markers National Register of Historic Places, one dot per listing

Featured markers

The Birth of Aviation

1899–1909

See it on a period map

Johnny Appleseed’s Run for Reinforcements

1812–1813

See it on a period map

Birthplace of Thomas A. Edison (1847-1931) / Edison Recalls Milan

1841–1947

See it on a period map

Battle of Fallen Timbers

1794–1795

See it on a period map

Ohio, Mother of Presidents · a 5-stop trail, page by page

Four presidents in five stops, from Grant’s birthplace on the Ohio River to Garfield’s Mentor, each on a map of its own era.

What an Ohio family sees

TreeAlive maps family trees. When a visitor's ancestors lived in Ohio, the markers standing near those places surface automatically alongside their family's journey:

Birthplace of Thomas A. Edison · a few streets from where a family lived in the 1850s · the brick cottage where the inventor was born in 1847, built by his father in 1841

When a marker stands near a place in your own tree, you have a personal reason to go see it. Open the live demo tree, choose the Crossings tab, and turn on Historical Markers to see the experience working (the demo family’s markers are in Pennsylvania; an Ohio family sees Ohio’s).

QR-ready, from day one

Every marker page has print-ready QR artwork. A scan at the sign opens the marker's page on the period map, no app to install. TreeAlive does no printing or installation.

Marker page links are permanent: identifiers are never reassigned, so a code printed today resolves for good.

QR code opening the The Birth of Aviation marker page

Scan: Birth of Aviation marker

Find a marker

Browsing all 1,782 markers by county.

Adams County 19

Allen County 8

Ashland County 8

Ashtabula County 13

Athens County 10

Auglaize County 10

Belmont County 22

Brown County 12

Butler County 49

Carroll County 3

Champaign County 35

Clark County 11

Clermont County 11

Clinton County 13

Columbiana County 16

Coshocton County 8

Crawford County 7

Cuyahoga County 158

Darke County 6

Defiance County 8

Delaware County 21

Erie County 32

Fairfield County 11

Fayette County 8

Franklin County 136

Fulton County 6

Gallia County 22

Geauga County 18

Greene County 32

Guernsey County 6

Hamilton County 100

Hancock County 22

Hardin County 16

Harrison County 3

Henry County 6

Highland County 8

Hocking County 6

Holmes County 4

Huron County 9

Jackson County 10

Jefferson County 13

Knox County 18

Lake County 25

Lawrence County 10

Licking County 30

Logan County 13

Lorain County 36

Lucas County 66

Madison County 3

Mahoning County 45

Marion County 19

Medina County 14

Meigs County 18

Mercer County 6

Miami County 35

Monroe County 6

Montgomery County 40

Morgan County 20

Morrow County 5

Muskingum County 16

Noble County 6

Ottawa County 22

Paulding County 6

Perry County 16

Pickaway County 11

Pike County 8

Portage County 20

Preble County 8

Putnam County 7

Richland County 10

Ross County 14

Sandusky County 9

Scioto County 11

Seneca County 15

Shelby County 9

Stark County 28

Summit County 47

Trumbull County 37

Tuscarawas County 32

Union County 23

Van Wert County 6

Vinton County 3

Warren County 21

Washington County 24

Wayne County 10

Williams County 9

Wood County 22

Wyandot County 7