• History of Ohio by period‎ (4 C)
• Pre-statehood history of Ohio‎ (15 C, 85 P)
• Histories of cities in Ohio‎ (8 C, 4 P)

A

• African-American history of Ohio‎ (12 C, 22 P)

C

• History of colleges and universities in Ohio‎ (3 P)

D

• Defunct amusement parks in Ohio‎ (20 P)
• Disasters in Ohio‎ (7 C, 8 P)

F

• Ohio folklore‎ (1 C, 5 P)
• Former buildings and structures in Ohio‎ (10 C)
• Former municipalities in Ohio‎ (1 C, 44 P)
• Former populated places in Ohio‎ (2 C, 8 P)

H

• Historians from Ohio‎ (142 P)
• Historic sites in Ohio‎ (10 C, 2 P)
• Historic trails and roads in Ohio‎ (1 C, 6 P)
• Historical societies in Ohio‎ (2 C, 11 P)
• History museums in Ohio‎ (9 C, 40 P)
• History of racism in Ohio‎ (4 C, 8 P)

L

• Labor disputes in Ohio‎ (14 P)
• Legal history of Ohio‎ (5 C, 18 P)
• LGBT history in Ohio‎ (3 P)

M

• Defunct mass media in Ohio‎ (1 C, 57 P)
• Military history of Ohio‎ (5 C, 1 P)

N

• Native American history of Ohio‎ (13 C, 35 P)

O

• Ohio History Connection‎ (43 P)
• Defunct organizations based in Ohio‎ (5 C, 2 P)

P

• Political history of Ohio‎ (8 C, 1 P)

R

• Riots and civil disorder in Ohio‎ (3 C, 15 P)

S

• Scandals in Ohio‎ (1 C)
• Ships built in Ohio‎ (6 C, 14 P)

U

• Underground railroad in Ohio‎ (7 P)

W

• History of women in Ohio‎ (4 C, 33 P)

• History of Ohio

0–9

• 1923 Ohio state highway renumbering
• 1927 Ohio state highway renumbering
• 1962 Ohio state highway renumbering

A

• Africa, Ohio

B

• John Warner Barber
• Battle of Lake Erie
• Bentonville Anti-Horse Thief Society
• Blackhand Gorge State Nature Preserve
• Blanchard's Fork Reserve, Ohio
• Buckeye Station

C

• Camp Chase
• Chillicothe Junto
• College Township
• Conflicts with Ohio participation
• Connecticut Land Company
• Connecticut Western Reserve
• Copus massacre

D

• Dohrman Tract

E

• Enterprise (1814)

F

• Findlay, Ohio minor league baseball history
• Floraville Historic District
• Fort Miami (Ohio)
• Fort Sandoské
• Fort Sandusky

G

• Grand Pacific Junction
• Grant Memorial coinage
• Jesse Root Grant
• Great Black Swamp
• Great Flood of 1913

H

• Historical Collections of Ohio
• Historic Ohio Canals

I

• Indian Head Rock
• Indian Land Grants

J

• Jefferson Furnace
• History of the Jews in Ohio
• Junundat

K

• Kakowatcheky
• Kauffman Motor Vehicle Company
• Kirtland Safety Society

L

• Anthony J. Lisska
• List of battles fought in Ohio
• List of Ohio suffragists

M

• Marion County Historical Society
• Maumee Road Lands
• McMyler-Interstate Company
• Nettie Metcalf

N

• Nawash-Kinjoano Reservation
• Neucheconeh

O

• Ohio Bicentennial
• Ohio History
• Ohio History Center
• Ohio History Connection
• Ohio State Fair
• Ohio Town

P

• Petroleum industry in Ohio

Q

• Quaker Mill Company

R

• Reservoir war

S

• John Smith (Ohio politician, died 1824)
• Spirit Fruit Society
• Ebenezer Sproat

T

• Thorla-McKee Well
• Timeline of the Toledo Strip
• Toledo War
• Turnpike Lands
• Twelve Mile Square Reservation
• Two Mile Square Reservation

U

• UA Archives (Upper Arlington, Ohio)
• Upper Sandusky Reservation

V

• Vehicle registration plates of Ohio

W

• White Sewing Machine Company

Z

• Zane family
• Zimmer massacre