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Marshall County, Illinois facts for kids

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Marshall County
Lacon Bridge in the county seat
Lacon Bridge in the county seat
Map of Illinois highlighting Marshall County
Location within the U.S. state of Illinois
Map of the United States highlighting Illinois
Illinois's location within the U.S.
Country  United States
State  Illinois
Founded January 19, 1839
Named for John Marshall
Seat Lacon
Largest city Henry
Area
 • Total 399 sq mi (1,030 km2)
 • Land 387 sq mi (1,000 km2)
 • Water 12 sq mi (30 km2)  2.9%
Population
 (2010)
 • Total 12,640
 • Estimate 
(2018)
11,534
 • Density 31.68/sq mi (12.231/km2)
Time zone UTC−6 (Central)
 • Summer (DST) UTC−5 (CDT)
Congressional district 18th

Marshall County is a county located in the U.S. state of Illinois. According to the 2010 census, it had a population of 12,640. Its county seat is Lacon.

Marshall County is part of the Peoria, IL Metropolitan Statistical Area.

History

Marshall County was formed in 1839 out of Putnam County. It was named in honor of John Marshall, Chief Justice of the United States Supreme Court, who died in 1835.

Geography

According to the U.S. Census Bureau, the county has a total area of 399 square miles (1,030 km2), of which 387 square miles (1,000 km2) is land and 12 square miles (31 km2) (2.9%) is water.

Climate and weather

Weather chart for Lacon, Illinois
J F M A M J J A S O N D
 
 
1.6
 
32
15
 
 
1.6
 
38
21
 
 
3.1
 
51
31
 
 
3.8
 
64
41
 
 
4.2
 
75
51
 
 
4.1
 
84
60
 
 
4.1
 
87
64
 
 
3.5
 
85
62
 
 
3.5
 
79
54
 
 
3
 
67
43
 
 
3
 
50
32
 
 
2.3
 
37
21
temperatures in °F
precipitation totals in inches
source: The Weather Channel

In recent years, average temperatures in the county seat of Lacon have ranged from a low of 15 °F (−9 °C) in January to a high of 87 °F (31 °C) in July, although a record low of −27 °F (−33 °C) was recorded in January 1999 and a record high of 103 °F (39 °C) was recorded in July 2005. Average monthly precipitation ranged from 1.55 inches (39 mm) in January to 4.20 inches (107 mm) in May.

Major highways

Adjacent counties

National protected area

Demographics

Historical population
Census Pop.
1840 1,849
1850 5,180 180.2%
1860 13,437 159.4%
1870 16,956 26.2%
1880 15,055 −11.2%
1890 13,653 −9.3%
1900 16,370 19.9%
1910 15,679 −4.2%
1920 14,760 −5.9%
1930 13,023 −11.8%
1940 13,179 1.2%
1950 13,025 −1.2%
1960 13,334 2.4%
1970 13,302 −0.2%
1980 14,479 8.8%
1990 12,846 −11.3%
2000 13,180 2.6%
2010 12,640 −4.1%
2018 (est.) 11,534 −8.7%
U.S. Decennial Census
1790-1960 1900-1990
1990-2000 2010-2013

As of the 2010 United States Census, there were 12,640 people, 5,161 households, and 3,549 families living in the county. The population density was 32.7 inhabitants per square mile (12.6/km2). There were 5,914 housing units at an average density of 15.3 per square mile (5.9/km2). The racial makeup of the county was 97.1% white, 0.4% Asian, 0.3% black or African American, 0.2% American Indian, 1.1% from other races, and 0.9% from two or more races. Those of Hispanic or Latino origin made up 2.5% of the population. In terms of ancestry, 43.0% were German, 16.7% were Irish, 14.4% were English, 7.2% were Italian, 6.2% were American, and 6.1% were Polish.

Of the 5,161 households, 27.4% had children under the age of 18 living with them, 56.7% were married couples living together, 7.7% had a female householder with no husband present, 31.2% were non-families, and 26.8% of all households were made up of individuals. The average household size was 2.40 and the average family size was 2.88. The median age was 44.8 years.

The median income for a household in the county was $49,116 and the median income for a family was $64,781. Males had a median income of $46,793 versus $28,549 for females. The per capita income for the county was $24,991. About 6.8% of families and 9.5% of the population were below the poverty line, including 11.4% of those under age 18 and 7.0% of those age 65 or over.

Communities

Cities

Villages

Unincorporated communities

Townships

  • Bell Plain
  • Bennington
  • Evans
  • Henry
  • Hopewell
  • Lacon
  • La Prairie
  • Richland
  • Roberts
  • Saratoga
  • Steuben
  • Whitefield
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