Plymouth County, Iowa

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Coordinates: 42°44′18″N 96°13′13″W / 42.73833, -96.22028

Plymouth County, Iowa
Plymouth County IA Courthouse
Map of Iowa highlighting Plymouth County
Location in the state of Iowa
Map of USA IA
Iowa's location in the U.S.
Founded 1851
Seat Le Mars
Largest city Le Mars
 - Total
 - Land
 - Water

864 sq mi (2,238 km²)
863 sq mi (2,235 km²)
0.8 sq mi (2 km²), 0.1%
 - (2010)
 - Density

29/sq mi (11/km²)
Congressional district 4th
Time zone Central: UTC-6/-5

Plymouth County is a county located in the U.S. state of Iowa. As of the 2010 census, the population was 24,986.[1] The county seat is Le Mars.[2] Plymouth County was named after Plymouth, Massachusetts.[3]

Plymouth County is part of the Sioux City, IA-NE-SD Metropolitan Statistical Area.

History Edit

Plymouth County was formed on January 15, 1851. Settlement began in the county in 1856. In October, 1859, the first courthouse was built in Melbourne, formerly located in the southeast quarter of section 34, Plymouth Township, about five to six miles due south of Merrill.[4] The first public school opened its doors there with 32 pupils. In 1872, the county seat was moved to Le Mars and a new courthouse and a jail were built there in 1873. The courthouse in present use was built in 1900 of red sandstone.[5]

During the Great Depression, the farmers organized a group, which they named the Farmers Holiday Group. The goal was to keep farm products off the market until the desired price was met. A radical group among them abducted Judge Bradley from his court chamber and threatened to hang him in the front of the courthouse. Bradley was freed, but the governor ordered the national guard to Plymouth County and declared state of emergency, which meant the end of the Farmers Holiday Group.[5][6]

Geography Edit

According to the U.S. Census Bureau, the county has a total area of 864 square miles (2,240 km2), of which 863 square miles (2,240 km2) is land and 0.8 square miles (2.1 km2) (0.1%) is water.[7] It is the fourth-largest county by area in Iowa.

Adjacent counties Edit


Major highways Edit


Le Mars Municipal Airport is located in Plymouth County, two nautical miles (3.7 km) southwest of the central business district of Le Mars, Iowa.

Demographics Edit

Historical populations
Census Pop.
1860 148
1870 2,199 1,385.8%
1880 8,566 289.5%
1890 19,568 128.4%
1900 22,209 13.5%
1910 23,129 4.1%
1920 23,584 2.0%
1930 24,159 2.4%
1940 23,502 −2.7%
1950 23,252 −1.1%
1960 23,906 2.8%
1970 24,322 1.7%
1980 24,743 1.7%
1990 23,388 −5.5%
2000 24,849 6.2%
2010 24,986 0.6%
Est. 2015 24,800 [8] −0.2%
U.S. Decennial Census[9]
1790-1960[10] 1900-1990[11]
1990-2000[12] 2010-2013[1]

2010 censusEdit

The 2010 census recorded a population of 24,986 in the county, with a population density of 28.9337/sq mi (11.17137/km2). There were 10,550 housing units, of which 9,875 were occupied.[13]

2000 censusEdit

USA Plymouth County, Iowa age pyramid

2000 Census Age Pyramid for Plymouth County

As of the census[14] of 2000, there were 24,849 people, 9,372 households, and 6,804 families residing in the county. The population density was 29 people per square mile (11/km²). There were 9,880 housing units at an average density of 11 per square mile (4/km²). The racial makeup of the county was 98.16% White, 0.29% Black or African American, 0.14% Native American, 0.27% Asian, 0.06% Pacific Islander, 0.46% from other races, and 0.62% from two or more races. 1.32% of the population were Hispanic or Latino of any race.

There were 9,372 households out of which 35.70% had children under the age of 18 living with them, 63.30% were married couples living together, 6.20% had a female householder with no husband present, and 27.40% were non-families. 24.00% of all households were made up of individuals and 12.00% had someone living alone who was 65 years of age or older. The average household size was 2.61 and the average family size was 3.12.

In the county the population was spread out with 28.30% under the age of 18, 7.20% from 18 to 24, 26.40% from 25 to 44, 22.00% from 45 to 64, and 16.00% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 98.80 males. For every 100 females age 18 and over, there were 95.70 males.

The median income for a household in the county was $41,638, and the median income for a family was $50,009. Males had a median income of $33,566 versus $22,558 for females. The per capita income for the county was $19,442. About 4.40% of families and 6.00% of the population were below the poverty line, including 6.70% of those under age 18 and 6.40% of those age 65 or over.

Points of interest Edit

The Pappas Telecasting Tower, with a height of 603.5 metres (1,980 ft), is one of the tallest masts in the world.

Notable natives Edit



Unincorporated communities Edit

  • Adaville
  • Brookdale
  • Crathorne
  • James
  • Mammen
  • Milnerville
  • Neptune
  • O'Leary
  • Plymouth
  • Potosia
  • Ruble
  • Seney
  • Union Center (Also known as "The U")
  • West Le Mars
  • Wren
  • Yeomans

Population rankingEdit

The population ranking of the following table is based on the 2010 census of Plymouth County.[15]

county seat

Rank City/Town/etc. Municipal type Population (2010 Census)

1 Sioux City (almost entirely in Woodbury County) City 82,684
2 Le Mars City 9,826
3 Remsen City 1,663
4 Akron City 1,486
5 Kingsley City 1,411
6 Hinton City 928
7 Merrill City 755
8 Brunsville City 151
9 Westfield City 132
10 Oyens City 103
11 Craig City 89
12 Struble City 78

See alsoEdit


  1. ^ a b "State & County QuickFacts". United States Census Bureau. Retrieved July 20, 2014. 
  2. ^ "Find a County". National Association of Counties. Retrieved 2011-06-07. 
  3. ^ Chicago and North Western Railway Company (1908). A History of the Origin of the Place Names Connected with the Chicago & North Western and Chicago, St. Paul, Minneapolis & Omaha Railways. p. 163. 
  4. ^ History of the Counties of Woodbury and Plymouth, Iowa. Chicago: A. Warner & Co.. 1890. p. 434. 
  5. ^ a b "Historical Facts About Plymouth County". Retrieved November 29, 2012. 
  6. ^ "Martial Law at Le Mars". Dubuque Telegraph-Herald: p. 1. April 28, 1933.,2785167&dq=lemarrs+iowa&hl=en. Retrieved November 29, 2012. 
  7. ^ "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. Retrieved 2011-04-23. 
  8. ^ "County Totals Dataset: Population, Population Change and Estimated Components of Population Change: April 1, 2010 to July 1, 2015". Retrieved July 2, 2016. 
  9. ^ "U.S. Decennial Census". United States Census Bureau. Retrieved July 20, 2014. 
  10. ^ "Historical Census Browser". University of Virginia Library. Retrieved July 20, 2014. 
  11. ^ "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. Retrieved July 20, 2014. 
  12. ^ "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000". United States Census Bureau. Retrieved July 20, 2014. 
  13. ^ "Population & Housing Occupancy Status 2010". United States Census Bureau American FactFinder. Retrieved June 1, 2011. 
  14. ^ "American FactFinder". United States Census Bureau. Retrieved 2008-01-31. 
  15. ^

External linksEdit

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