The average household size was 2.38 and the average family size was 2.87. Of the 6,079 households, 28.9% had children under the age of 18 living with them, 52.1% were married couples living together, 10.3% had a female householder with no husband present, 33.2% were non-families, and 28.4% of all households were made up of individuals. In terms of ancestry, 33.8% were German, 15.6% were American, 11.1% were English, and 10.3% were Irish. Those of Hispanic or Latino origin made up 0.8% of the population. The racial makeup of the county was 98.1% white, 0.4% black or African American, 0.3% Asian, 0.2% American Indian, 0.1% from other races, and 0.9% from two or more races. There were 7,077 housing units at an average density of 13.1 per square mile (5.1/km 2). The population density was 27.2 inhabitants per square mile (10.5/km 2). Chautauqua National Wildlife Refuge (part)ĭemographics Historical population CensusĪs of the 2010 United States Census, there were 14,666 people, 6,079 households, and 4,060 families living in the county.Average monthly precipitation ranged from 1.85 inches (47 mm) in January to 4.43 inches (113 mm) in May. In recent years, average temperatures in the county seat of Havana have ranged from a low of 14 ☏ (−10 ☌) in January to a high of 88 ☏ (31 ☌) in July, although a record low of −30 ☏ (−34 ☌) was recorded in January 1999 and a record high of 106 ☏ (41 ☌) was recorded in July 1983. Fish and Wildlife Service as the Chautauqua National Wildlife Refuge.Ĭlimate and weather Havana, Illinois Modern irrigation has made this a highly productive agricultural area.Ī sand wetland on the Illinois River is managed by the U.S. However, the soil is very good for growing vegetables that are otherwise not common in Illinois. The sandy soil does not hold water well, quickly exposing crops to drought conditions as the water table drops during periods of low precipitation. Meltwater from the glacier deposited large amounts of sand in a delta region near at the junction of the Sangamon and Illinois Rivers. This was formed during the melting of the Wisconsin Glacier about 10,000 years ago. The soil covering much of Mason County is very sandy. These rivers join at the county's southwest tip. Mason County is bound on the south by the Sangamon River, and on the west by the Illinois River. Census Bureau, the county has an area of 563 square miles (1,460 km 2), of which 539 square miles (1,400 km 2) is land and 24 square miles (62 km 2) (4.3%) is water. Mason County at the time of its creation in 1841Īccording to the U.S.
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