THE HISTORICAL
MARKER DATABASE
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Historical Markers and War Memorials in Ada, Ohio

 
Clickable Map of Hardin County, Ohio and Immediately Adjacent Jurisdictions image/svg+xml 2019-10-06 U.S. Census Bureau, Abe.suleiman; Lokal_Profil; HMdb.org; J.J.Prats/dc:title> https://commons.wikimedia.org/wiki/File:Usa_counties_large.svg Hardin County, OH (88) Allen County, OH (276) Auglaize County, OH (247) Hancock County, OH (148) Logan County, OH (226) Marion County, OH (63) Union County, OH (73) Wyandot County, OH (86)  HardinCounty(88) Hardin County (88)  AllenCounty(276) Allen County (276)  AuglaizeCounty(247) Auglaize County (247)  HancockCounty(148) Hancock County (148)  LoganCounty(226) Logan County (226)  MarionCounty(63) Marion County (63)  UnionCounty(73) Union County (73)  WyandotCounty(86) Wyandot County (86)
Kenton is the county seat for Hardin County
Ada is in Hardin County
Hardin County (88)  ►
ADJACENT TO HARDIN COUNTY
Allen County (276)  ►
Auglaize County (247)  ►
Hancock County (148)  ►
Logan County (226)  ►
Marion County (63)  ►
Union County (73)  ►
Wyandot County (86)  ►
 
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1 ► Ohio, Hardin County, Ada — Ada Civil War Memorial —
In Memory of Our Soldiers 1861-1865 “Lest We Forget” — — Map (db m29021) HM
2 ► Ohio, Hardin County, Ada — 16-33 — Ada Passenger Depot, 1887 — Pennsylvania Railroad, Southwest Division —
Ada grew alongside the tracks of the Ohio & Indiana Railroad, completed in 1854 between Crestline, Crawford County, and Fort Wayne, Indiana. This line became part of the Southwest Division of the Pennsylvania Railroad in 1869. Ada's rapid growth as . . . — — Map (db m29014) HM
3 ► Ohio, Hardin County, Ada — Davis Grove —
Robert R. Davis Jr. taught history and geography at ONU from 1966-1997. He was an innovative teacher and a groundbreaking scholar of Black nationalism. Bob loved trees. The trees it this grove are the gift of his friends to the university! — — Map (db m248208) HM
4 ► Ohio, Hardin County, Ada — Dedicated To All Veterans —
Dedicated to all veterans who served in the United States armed forces with devotion, loyalty, honor and their determination to preserve freedom "Freedom Is Not Free" — — Map (db m229135) WM
5 ► Ohio, Hardin County, Ada — Dr. Martin Luther King, Jr. — at Ohio Northern University January 11, 1968 —
On January 11, 1968, in Taft Memorial Gymnasium, on this site, Dr. Martin Luther King, Jr., addressed the community of Ohio Northern University. Ohio Northern University became one of the last campuses this preeminent American civil rights . . . — — Map (db m248215) HM
6 ► Ohio, Hardin County, Ada — Henry Solomon Lehr — 1838 - 1923 —
Founder of the University 1871 Citizen & Soldier Educational Visionary Man of Faith — — Map (db m248206) HM
7 ► Ohio, Hardin County, Ada — The Liberty National Bank Of Ada —
. . . — — Map (db m229133) HM
8 ► Ohio, Hardin County, Ada — Memorial Park —
Dedicated to perpetuate the memory of our valiant defenders of freedom who made the supreme sacrifice in World War I and World War II World War I Walter Agin • Stanley Foss • Leo Hawk • James McElroy • Roggeill Meyer World War . . . — — Map (db m229138) WM
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9 ► Ohio, Hardin County, Ada — Northwestern Ohio Volunteer Firemen's Association —
Association organized 1874 Ada, Ohio Founded to promote the safety and welfare of volunteer firemen's organizations — — Map (db m229136) HM
10 ► Ohio, Hardin County, Ada — 14-33 — Ohio Northern University —
Henry Solomon Lehr founded Ohio Northern University in 1871 as the Northwestern Ohio Normal School. Its purpose was to train teachers and to provide higher education to the people of Northwest Ohio. In 1885, the school became Ohio Normal . . . — — Map (db m29025) HM
11 ► Ohio, Hardin County, Ada — Ohio Northern University — Founded 1871 —
Ohio Northern University was founded on this site in 1871 by Henry Solomon Lehr as the Northwest Ohio Normal School. The University has provided liberal and professional education in a Christian setting since its founding and has been related to the . . . — — Map (db m248203) HM
12 ► Ohio, Hardin County, Ada — Veterans Memorial —
Dedicated to the men and women of Ada and vicinity who served their country in war — — Map (db m248202) WM
 
 
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Oct. 10, 2026