Allen County , Ohio

Allen County: County in Ohio, United States

Allen County locator map
Location of Allen County on Ohio map.


Allen County is a county located in the U.S. state of Ohio. As of the 2010 census, the population was 106,331 and a population density of 101 people per km². After 9 years in 2019 county had an estimated population of 102,351 inhabitants. Its county seat is Lima. The county was created 190 years ago in 1831.


Allen County is located at 40°46'17"N 84°6'21"W (40.7715200, -84.1057800). It has 4 neighbors: Auglaize County, Hardin County, Putnam County and Van Wert County.

Lima-ohio-courthouse image

The largest city of Allen County is Fort Shawnee with a population of 3,726. Other cities include, Spencerville population 2,161, Harrod population 403 and Beaverdam population 371. See all Allen County cities & populated places.


Allen County forecast: Sunny, with a high near 81. more

Lima-ohio-courthouse image

Allen County map

Allen County Quick Facts

Population : 102,351 (2019)
Country : United States of America
State : Ohio (United States)
Different from : Alleghany County, Allegany County, Allegan County, Allegheny County, Alleghany County
Plate code : 02
Area : 1054 km2
Official name : Allen County
Water as percent of area : 1.1%
Land as percent of area : 98.9%
Named for : Ethan Allen
Capital : Lima
Establishment : March 03, 1831
Time Zone : America/New_York
Local time : 05:43:39 (4th August 2021)
Density : 97 Pop. per km² as of 2019
Population growth : -3.89% (2010-2019)
Weather : 81℉ Sunny 7-days weather

Allen County has 4 neighbours.

  • Lima


According to census records, the population of Allen County decreased by 3.89% in 9 years.

Year Population % Change Method
2010 106,331 - census
2011 105,988 -0.32% estimation process
2012 105,244 -0.71% estimation process
2013 105,055 -0.18% estimation process
2014 104,848 -0.2% estimation process
2015 104,095 -0.72% estimation process
2016 103,613 -0.47% estimation process
2017 103,093 -0.5% estimation process
2018 102,725 -0.36% estimation process
2019 102,351 -0.37% estimation process

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Other places with the same name (3)

Allen County Populated Places

Cities, Towns, Neighborhoods & Other Populated Places in Allen County.

City Name Population Title
Lima 37,873
Bluffton 4,082 Town in northwest Ohio
Fort Shawnee 3,726 City in Allen County, Ohio, United States of America
Spencerville 2,161 City in Allen County, Ohio, United States of America
Elida 1,803 Town in New Mexico, United States
Cairo 523 Town in Ohio, United States
Harrod 403 Human settlement in Allen County, Ohio, United States of America
Beaverdam 371 Human settlement in Allen County, Ohio, United States of America

Ohio Other Counties (more counties)

County Name Population Title
Ohio 11,689,100 State of the United States of America
Franklin County 1,316,756 County in Massachusetts, United States
Cuyahoga County 1,235,072 County in Ohio, United States
Columbus 879,279 Capital city of Ohio, United States
Hamilton County 817,473 County in New York, United States
Summit County 541,013 County in northern Utah, United States
Montgomery County 531,687 County in Ohio, United States
Lucas County 428,348 County in Ohio, United States
Butler County 383,134 County in Ohio, United States of America
Cleveland 381,009 City in Ohio, United States
Stark County 370,606 County in Ohio, United States
Lorain County 309,833 County in Ohio, United States
Cincinnati 303,940 City in Ohio, United States; county seat of Hamilton County
Toledo 272,779 County seat of Lucas County, Ohio, United States
Warren County 234,602 County in New York, United States
Lake County 230,149 County in Ohio, United States

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