|Ida County, Iowa|
Location in the U.S. state of Iowa
Iowa's location in the U.S.
|Founded||15 January 1851|
|Largest city||Ida Grove|
|• Total||432 sq mi (1,119 km2)|
|• Land||432 sq mi (1,119 km2)|
|• Water||0.5 sq mi (1 km2), 0.1%|
|• ( 2010)||7,089|
|• Density||16/sq mi (6/km2)|
|Time zone||Central: UTC−6/ −5|
Ida County is a county located in the U.S. state of Iowa. As of the 2010 census, the population was 7,089.  The county seat is Ida Grove.  The county was authorized by the Iowa Legislature in January 1851 as a packet of projected counties in unorganized territory of western Iowa. It was named after Ida Smith, the first child of European immigrants to be born in this region. 
The Iowa Legislature authorized the formation of 49 counties in previously–unregulated western Iowa on 15 January 1851.  This date is usually cited as the date of formation of Ida County; however, as there were no inhabitants of that area, no action was taken to form a county government.
On 12 January 1853, the Legislature authorized creation of Woodbury County, and included the proviso that the area of Ida County be included with Woodbury for revenue, election, and judicial purposes. In 1853 there were still no settlers in Ida County's lands. 
The county's first permanent settlers (Comstock and Moorehead) arrived in 1856. In 1858 the county government was organized, with John Moorehead appointed County Judge. There were about 40 county residents at that time. 
The county's only postoffice, as well as the first courthouse, was operated from Judge Moorehead's house. 
The county's first dedicated school building was raised in 1861. 
The county's first newspaper, Ida County Pioneer, was started in 1872. The first bank opened in 1876. Railroads arrived in Ida County in 1877, when the Maple Valley branch of the Chicago & North Western Railway was built. This resulted in a flood of settlers, and within five years, nearly all the available land had been purchased. 
- US Highway 20 – runs east–west through the northern part of the county, passing Holstein.
- US Highway 59 – runs generally north–south through the center of the county, passing Ida Grove. Its exit at south county line is five miles east of its entry point on north county line.
- Iowa Highway 31 - cuts across the northwestern tip of Ida County, running southwest from Cherokee County to Woodbury County.
- Iowa Highway 175 – runs east–west through the southern part of the county, passing Ida Grove.
|U.S. Decennial Census
1790-1960  1900-1990 
1990-2000  2010-2013 
The 2010 census recorded a population of 7,089 in the county, with a population density of 16.4207/sq mi (6.3401/km2). There were 3,426 housing units, of which 3,052 were occupied. 
As of the census  of 2000, there were 7,837 people, 3,213 households, and 2,184 families residing in the county. The population density was 18 people per square mile (7/km²). There were 3,506 housing units at an average density of 8 per square mile (3/km²). The racial makeup of the county was 99.02% White, 0.10% Black or African American, 0.06% Native American, 0.24% Asian, 0.15% from other races, and 0.42% from two or more races. 0.47% of the population were Hispanic or Latino of any race.
There were 3,213 households out of which 29.40% had children under the age of 18 living with them, 59.50% were married couples living together, 5.90% had a female householder with no husband present, and 32.00% were non-families. 29.30% of all households were made up of individuals and 15.90% had someone living alone who was 65 years of age or older. The average household size was 2.39 and the average family size was 2.95.
In the county, the population was spread out with 25.50% under the age of 18, 6.10% from 18 to 24, 24.00% from 25 to 44, 22.70% from 45 to 64, and 21.80% who were 65 years of age or older. The median age was 42 years. For every 100 females there were 93.90 males. For every 100 females age 18 and over, there were 91.40 males.
The median income for a household in the county was $34,805, and the median income for a family was $43,179. Males had a median income of $29,002 versus $19,417 for females. The per capita income for the county was $18,675. About 5.70% of families and 8.80% of the population were below the poverty line, including 9.10% of those under age 18 and 8.60% of those age 65 or over.
† county seat
|Rank||City/Town/etc.||Municipal type||Population (2010 Census)
|1||† Ida Grove||City||2,142|
- Ida County Courthouse
- National Register of Historic Places listings in Ida County, Iowa
- Waveland Round Barn, listed on the National Register of Historic Places
- "State & County QuickFacts". United States Census Bureau. Archived from the original on 11 July 2011. Retrieved 17 July 2014.
- "Find a County". National Association of Counties. Archived from the original on 31 May 2011. Retrieved 7 June 2011.
- Ida County History
- IOWA - Consolidated Chronology of State and County Government. 50 counties were affected: 49 new counties were created, and Pottawattamie County was enlarged with a portion of Non-County Area 3 that had been attached to Mahaska County. See Iowa Acts 1850-51, chapter 9. Section 26 delineates the new Ida County.
- John Moorehead was named Postmaster of Ida PO on 21 July 1857. See Ida County History.
- "US Gazetteer files: 2010, 2000, and 1990". US Census Bureau. 12 February 2011. Retrieved 23 April 2011.
- "Population and Housing Unit Estimates". Retrieved 9 June 2017.
- "U.S. Decennial Census". US Census Bureau. Archived from the original on 12 May 2015. Retrieved 17 July 2014.
- "Historical Census Browser". University of Virginia Library. Retrieved 17 July 2014.
- "Population of Counties by Decennial Census: 1900 to 1990". US Census Bureau. Retrieved 17 July 2014.
- "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). US Census Bureau. Retrieved 17 July 2014.
- "Population & Housing Occupancy Status 2010". US Census Bureau – American FactFinder. Retrieved 18 May 2011.
- "American FactFinder". US Census Bureau. Retrieved 31 January 2008.
- "Archived copy". Archived from the original on 21 December 2013. Retrieved 13 February 2016.
- Leip, David. "Dave Leip's Atlas of U.S. Presidential Elections". uselectionatlas.org. Retrieved 26 April 2018.
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