Putnam County, Illinois

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Putnam County, Illinois
Map of Illinois highlighting Putnam County
Location in the state of Illinois
Map of the United States highlighting Illinois
Illinois's location in the U.S.
Founded1825
SeatHennepin
Area
 • Total172.22 sq mi (446 km2)
 • Land160.16 sq mi (415 km2)
 • Water12.06 sq mi (31 km2), 7.00%
Population
 • (2010)6,006
 • Density39/sq mi (15/km²)
Time zoneCentral: UTC-6/-5
 
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Putnam County, Illinois
Map of Illinois highlighting Putnam County
Location in the state of Illinois
Map of the United States highlighting Illinois
Illinois's location in the U.S.
Founded1825
SeatHennepin
Area
 • Total172.22 sq mi (446 km2)
 • Land160.16 sq mi (415 km2)
 • Water12.06 sq mi (31 km2), 7.00%
Population
 • (2010)6,006
 • Density39/sq mi (15/km²)
Time zoneCentral: UTC-6/-5

Putnam County is the smallest county of the U.S. state of Illinois (in terms of total area). According to the 2010 census, it has a population of 6,006, which is a decrease of 1.3% from 6,086 in 2000.[1] The county was formed in 1825 out of Fulton County. It is named after Israel Putnam,[2] who was a general in the American Revolution. The county seat is Hennepin.[3]

Putnam County is part of the OttawaStreator Micropolitan Statistical Area.

Geography[edit]

According to the 2010 census, the county has a total area of 172.22 square miles (446.0 km2), of which 160.16 square miles (414.8 km2) (or 93.00%) is land and 12.06 square miles (31.2 km2) (or 7.00%) is water.[4]

Cities and towns[edit]

Townships[edit]

Putnam County is divided into these four townships: Granville, Hennepin, and Magnolia on the east side of the Illinois River, and Senachwine on the west.

Major highways[edit]

Adjacent counties[edit]

History[edit]

Demographics[edit]

Historical population
CensusPop.
18402,131
18503,92484.1%
18605,58742.4%
18706,28012.4%
18805,554−11.6%
18904,730−14.8%
19004,7460.3%
19107,56159.3%
19207,5790.2%
19305,235−30.9%
19405,2891.0%
19504,746−10.3%
19604,570−3.7%
19705,0079.6%
19806,08521.5%
19905,730−5.8%
20006,0866.2%
20106,006−1.3%
Est. 20125,886−2.0%
U.S. Decennial Census[5]
2012 Estimate[6]

As of the census[7] of 2000, there were 6,086 people, 2,415 households, and 1,748 families residing in the county. The population density was 38 people per square mile (15/km²). There were 2,888 housing units at an average density of 18 per square mile (7/km²). The racial makeup of the county was 97.62% White, 0.62% Black or African American, 0.35% Native American, 0.26% Asian, 0.62% from other races, and 0.53% from two or more races. 2.81% of the population were Hispanic or Latino of any race. 26.9% were of German, 20.0% Italian, 8.1% Irish, 7.1% Polish and 5.5% Swedish ancestry according to Census 2000. There were 2,415 households out of which 30.50% had children under the age of 18 living with them, 62.10% were married couples living together, 7.00% had a female householder with no husband present, and 27.60% were non-families. 24.60% of all households were made up of individuals and 12.30% had someone living alone who was 65 years of age or older. The average household size was 2.52 and the average family size was 2.99. In the county the population was spread out with 25.10% under the age of 18, 7.00% from 18 to 24, 26.70% from 25 to 44, 25.30% from 45 to 64, and 15.90% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 97.70 males. For every 100 females age 18 and over, there were 96.20 males.

The median income for a household in the county was $45,492, and the median income for a family was $50,708. Males had a median income of $40,938 versus $21,706 for females. The per capita income for the county was $19,792. About 4.20% of families and 5.50% of the population were below the poverty line, including 8.80% of those under age 18 and 3.10% of those age 65 or over.

Climate and weather[edit]

Hennepin, Illinois
Climate chart (explanation)
JFMAMJJASOND
 
 
1.1
 
30
13
 
 
1.2
 
36
19
 
 
2.2
 
48
29
 
 
3.2
 
62
39
 
 
3.6
 
73
50
 
 
4.2
 
83
59
 
 
3.8
 
86
64
 
 
4.3
 
84
62
 
 
3.6
 
77
53
 
 
2.7
 
65
41
 
 
2.5
 
49
31
 
 
2
 
36
19
Average max. and min. temperatures in °F
Precipitation totals in inches
Source: The Weather Channel[8]

In recent years, average temperatures in the county seat of Hennepin have ranged from a low of 13 °F (−11 °C) in January to a high of 86 °F (30 °C) in July, although a record low of −30 °F (−34 °C) was recorded in January 1999 and a record high of 104 °F (40 °C) was recorded in June 1988. Average monthly precipitation ranged from 1.14 inches (29 mm) in January to 4.32 inches (110 mm) in August.[8]

See also[edit]

References[edit]

  1. ^ "Putnam County QuickFacts". United States Census Bureau. Retrieved 2011-11-05. 
  2. ^ "About Putnam County". Putnam County, Illinois. Retrieved 2012-07-27. 
  3. ^ "Find a County". National Association of Counties. Retrieved 2011-06-07. 
  4. ^ "Census 2010 U.S. Gazetteer Files: Counties". United States Census. Retrieved 2011-11-05. 
  5. ^ "U.S. Decennial Census". Census.gov. Retrieved July 28, 2013. 
  6. ^ "Annual Estimates of the Resident Population: April 1, 2010 to July 1, 2012". Census.gov. Retrieved July 28, 2013. 
  7. ^ "American FactFinder". United States Census Bureau. Retrieved 2008-01-31. 
  8. ^ a b "Monthly Averages for Hennepin, Illinois". The Weather Channel. Retrieved 2011-01-27. 

External links[edit]

Coordinates: 41°12′N 89°17′W / 41.20°N 89.28°W / 41.20; -89.28