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Hamilton County, Ohio

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  • Emmet Joseph O'Brien (1899 - 1977)
    Parents: John Dillon O'Brien, Anastasia Jane Flemmming O'Brien. Siblings: John, Antonine, Alice, Margaret, Mary, Edward. Spouse: Viola Mary Knoll
  • Peter Kemper (1743 - 1829)
    A Patriot of the American Revolution for VIRGINIA with the rank of ENSIGN. DAR Ancestor # A064523 Reference: TNG Genealogy - SmartCopy : Jun 25 2021, 19:03:52 UTC
  • Dr. Edwin Bernard Topmiller, Sr. (1878 - 1963)
    Son of Bernard Jacob and Julia Ursula (Hausser) Topmiller Husband of Alma Elizabeth Kister Married: November 6, 1912 in Warren County, Kentucky He graduated from McKilip Veterinary School in Chicago,...
  • Frederick Cadwell West (1825 - 1886)
  • Henry Franklin West (1822 - 1893)

Please add profiles for those who were born, lived or died in Hamilton County, Ohio.

Official Website


The southern portion of Hamilton County was originally owned and surveyed by John Cleves Symmes, and the region was a part of the Symmes Purchase. The first settlers rafted down the Ohio River in 1788 following the American Revolutionary War. They established the towns of Losantiville (later Cincinnati), North Bend, and Columbia.

Hamilton County was organized in 1790 by order of Arthur St. Clair, governor of the Northwest Territory, as the second county in the Northwest Territory. Cincinnati was named as the seat. Residents named the county in honor of Alexander Hamilton, who was the first Secretary of the Treasury of the United States and a founder of the Federalist Party. Its original boundaries were those defined for the Symmes purchase contract in 1788: the Ohio River in the South, Great Miami River to the west, the Lesser Miami River to the east, and the Cayuhoga River to the North. Its area then included about one-eighth of Ohio, and had about 2,000 inhabitants (not including the remaining Native Americans). The county was greatly expanded in 1792 to include what is today the lower peninsula of Michigan. Since 1796, other counties were created from Hamilton, reducing the county to its present size.

The county was the location of much of the Northwest Indian War both before and after its organization.

The United States forcibly removed most of the Shawnee and other Indian peoples to move to locations west of the Mississippi River in the 1820s. Rapid growth occurred during the 1830s and 1840s as the area attracted many German and Irish immigrants, especially after the Great Famine in Ireland and the revolutions in Germany in 1848.

During the Civil War, Morgan's Raid (a Confederate cavalry campaign from Kentucky) passed through the northern part of the county during the summer of 1863.

Adjacent Counties


  • Blue Ash
  • Cheviot
  • Cincinnati (County Seat)
  • Deer Park
  • Fairfield (part)
  • Forest Park
  • Harrison
  • Indian Hill
  • Loveland (part)
  • Madeira
  • Milford (part)
  • Montgomery
  • Mount Healthy
  • North College Hill
  • Norwood
  • Reading
  • Sharonville (part)
  • Springdale
  • Wyoming


  • Addyston
  • Amberley
  • Arlington Heights
  • Cleves
  • Elmwood Place
  • Evendale
  • Fairfax
  • Glendale
  • Golf Manor
  • Greenhills
  • Lincoln Heights
  • Lockland
  • Mariemont
  • Newtown
  • North Bend
  • Silverton
  • St. Bernard
  • Terrace Park
  • Woodlawn

Other Townships & Communities: Anderson, Blue Jay, Brecon, Bridgetown, Camp Dennison, Cherry Grove, Coldstream, Colerain, Colerain Heights, Columbia, Concorde Hills, Covedale, Crosby, Delhi, Delhi Hills, Delshire, Dent, Dillonvale, Dry Ridge, Dry Run, Dunlap, Elizabethtown, Finneytown, Forestville, Fruit Hill, Grandview, Green, Groesbeck, Harrison, Highpoint, Hooven, Kenwood, Loveland Park (part), Mack, Miami, Miami Heights, Miamitown, Mill Creek (defunct), Monfort Heights, Mount Healthy Heights, Mount Saint Joseph, New Baltimore, New Burlington, New Haven, Northbrook, Northgate, Plainville, Pleasant Hills, Pleasant Run, Pleasant Run Farms, Remington, Rossmoyne, Salem Heights, Shawnee, Sherwood, Sixteen Mile Stand, Skyline Acres, Springfield, Sycamore, Symmes, Taylor Creek, Turpin Hills, White Oak and Whitewater

List of Neighborhoods




Nat'l Reg. of Hist. Places