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☰ Menu US Gazetteer Ohio Counties Cities ZIP Codes Features US > Ohio Ohio Gazetteer Ohio - Basic Information Became a State: March 1, 1803 - 17th State Population: 11,536,504 (2010 Census) - Ranks 7th Land Area: 40,860.7 square miles - Ranks 35th Population Density: 282.3 persons per square mile - Ranks 10th Housing Units: 5,127,508 (2010 Census) Housing Unit Density: 125.5 housing units per square mile July 1, 2019 Estimates: Ohio Data and Demographics State Capital: Columbus State Website: Official State of Ohio Website Ohio State Flag Quick & Easy Ways to... Get Current Demographic Data for Cities, Towns, and ZIP Codes View Boundary Maps, for Cities, Towns, and ZIP Codes Locate Physical, Cultural, and Historical Features Use HTL Address Research for a Ohio Address and get... Boundary Maps, Demographic Data, School Zones Review maps and data for the neighborhood , city, county, ZIP Code, and school zone. July 1, 2019, data includes home values, household income, percentage of homes owned, rented or vacant , etc. Ohio History Ohio State Flower - Scarlet Carnation The area of Ohio was part of the original territory of the United States, being part of lands ceded by four states to the United States and designated in 1787 as the "Territory northwest of the River Ohio." It also included the area known as the Connecticut Western Reserve, which was not ceded by Connecticut to the United States until 1800. Ohio Territory was organized on April 30, 1802, from the Northwest Territory, with generally the same boundary as the present state. Ohio was admitted to the Union on February 19, 1803, as the 17th state. Ohio acquired legal title to the area known as the Toledo Strip when Michigan ceded its claim in 1836. Although not yet legally established as a separate entity, census data for Ohio are available beginning with the 1800 census. The 1800 census population for Michigan includes the population of a small area in present-day Ohio. The 1800 population of the legally established Northwest Territory (of which Ohio was a part) was 45,916. For an explanation of the revision to the 1800 population of Ohio, see Richard L. Forstall, Population of States and Counties of the United States: 1790-1990, Washington, DC: U.S. Government Printing Office, 1996, page 126. Data for the legally established state of Ohio are available beginning with the 1810 census. Ohio Geographical Areas See: Geographic Terms & Concepts Counties & County Equivalents Interactive Map of Ohio Counties | Static Overview Map of Ohio Counties There are 88 counties in Ohio. Each county is governed by a board of county commissioners. Adams Allen Ashland Ashtabula Athens Auglaize Belmont Brown Butler Carroll Champaign Clark Clermont Clinton Columbiana Coshocton Crawford Cuyahoga Darke Defiance Delaware Erie Fairfield Fayette Franklin Fulton Gallia Geauga Greene Guernsey Hamilton Hancock Hardin Harrison Henry Highland Hocking Holmes Huron Jackson Jefferson Knox Lake Lawrence Licking Logan Lorain Lucas Madison Mahoning Marion Medina Meigs Mercer Miami Monroe Montgomery Morgan Morrow Muskingum Noble Ottawa Paulding Perry Pickaway Pike Portage Preble Putnam Richland Ross Sandusky Scioto Seneca Shelby Stark Summit Trumbull Tuscarawas Union Van Wert Vinton Warren Washington Wayne Williams Wood Wyandot -- Select County -- Adams Allen Ashland Ashtabula Athens Auglaize Belmont Brown Butler Carroll Champaign Clark Clermont Clinton Columbiana Coshocton Crawford Cuyahoga Darke Defiance Delaware Erie Fairfield Fayette Franklin Fulton Gallia Geauga Greene Guernsey Hamilton Hancock Hardin Harrison Henry Highland Hocking Holmes Huron Jackson Jefferson Knox Lake Lawrence Licking Logan Lorain Lucas Madison Mahoning Marion Medina Meigs Mercer Miami Monroe Montgomery Morgan Morrow Muskingum Noble Ottawa Paulding Perry Pickaway Pike Portage Preble Putnam Richland Ross Sandusky Scioto Seneca Shelby Stark Summit Trumbull Tuscarawas Union Van Wert Vinton Warren Washington Wayne Williams Wood Wyandot County Subdivisions There are 1,604 county subdivisions in Ohio known as minor civil divisions (MCDs). There are 1,324 townships of which are all functioning governmental units except for unpopulated Wayne township in Montgomery County and 15 townships that are wholly within the boundaries of an incorporated place. (Any township that is entirely within an incorporated place is nonfunctioning.) A nonfunctioning township is created when a place that is independent of townships annexes area from an adjacent township, but does not remove the annexed area from the original township. Where this occurs, the Census Bureau creates a fictitious township, generally named after the incorporated place, that conforms to the area that is independent of any township. There are 258 incorporated places that are wholly or partially independent of any county subdivision creating 274 entities that the Census Bureau treats as equivalent to county subdivisions. In addition, there are five undefined MCDs that represent water area. Places (Incorporated Cities, Towns & Census Designated Places (CDPs)) Ohio State Bird - Cardinal Ohio has 1,204 places; 938 incorporated places and 266 census designated places (CDPs). The incorporated places consist of 250 cities and 688 villages. There are 179 cities and 79 villages that are entirely or partially independent of the surrounding county subdivisions creating 192 and 82 county subdivisions, respectively. Of the 179 cities, 13 cities are partially independent, that is, the city is independent of county subdivisions in one county and dependent in another. These 13 cities are Alliance, Columbus, Crestline, Dublin, Fostoria, Galion, Huber Heights, Middletown, Rittman, Sharonville, Union, Vermilion, and Westerville. Lastly, there are 11 cities and three villages that contain an entire nonfunctioning township and also are dependent within a governmental township. These places are Celina, Columbus, Delaware, Dublin, Galion, Lancaster, Mansfield, Medina, Reynoldsburg, Union, and Westerville cities; and Creston, Seville, and Sunbury villages. Lastly, there are five cities that can legally exist in only one township but are not coextensive—Gahanna, Geneva, Springboro (Warren County portion only), Troy, and Worthington cities. Cities have a minimum population of 5,000 and villages have a population less than 5,000 and are classified based on Census Bureau counts as certified by the Ohio Secretary of State. Ohio Land & Properties for Sale Click Here To Find Amazing Properties, Farms & Ranches Available Now in Ohio. Alphabetical List of Cities, Towns, CDPs and Other Populated Places A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q, R | S | T | U, V | W, X, Y, Z Ohio Civil Features Ohio Civil Features : Political Subdivisions, Native Areas, Land Grants, etc. - sorted by Census Class Codes . Metropolitan and Micropolitan Statistical Areas There are 13 Metropolitan and 33 Micropolitan Statistical Areas in Ohio. OH Metopolitan & Micropolitan Areas Ohio ZIP Code Tabulation Areas There are 1,197 ZIP Code tabulation areas (ZCTAs) in Ohio. View Ohio ZIP Codes and ZIP Code Maps . School Districts Ohio has 616 unified school districts. View Ohio Public and Private Schools . Congressional Districts Ohio has 16 congressional districts. An interactive map shows the contact information for each Representative as well as the boundaries for each Ohio district. View Map of Ohio Congressional Districts . State Legislative Districts There are 33 state senate districts and 99 state house districts in Ohio. In addition, there is one state house district undefined and one state senate district undefined that encompass water area. Ohio Physical, Cultural and Historic Features Ohio Physical Features such as lakes, islands, streams, valleys, summits, etc. Ohio Cultural Features such as schools, churches, hospitals, parks, dams, reservoirs, etc. Ohio Historical Features and Ohio Historic Landmarks O...