According to the U.S. Census Bureau, the county has a total area of 994 km˛ (384 mi˛). 974 km˛ (376 mi˛) of it is land and 20 km˛ (8 mi˛) of it is water. The total area is 2.04% water.
Demographics
As of the census2 of 2000, there are 13,695 people, 5,347 households, and 3,689 families residing in the county. The population density is 14/km˛ (36/mi˛). There are 5,784 housing units at an average density of 6/km˛ (15/mi˛). The racial makeup of the county is 94.93% White, 0.45% Black or African American, 0.17% Native American, 0.28% Asian, 0.03% Pacific Islander, 3.34% from other races, and 0.82% from two or more races. 8.48% of the population are Hispanic or Latino of any race.
There are 5,347 households out of which 32.00% have children under the age of 18 living with them, 55.80% are married couples living together, 9.20% have a female householder with no husband present, and 31.00% are non-families. 26.10% of all households are made up of individuals and 13.00% have someone living alone who is 65 years of age or older. The average household size is 2.52 and the average family size is 3.01.
In the county the population is spread out with 25.40% under the age of 18, 8.40% from 18 to 24, 27.80% from 25 to 44, 22.70% from 45 to 64, and 15.70% who are 65 years of age or older. The median age is 37 years. For every 100 females there are 98.70 males. For every 100 females age 18 and over, there are 94.70 males.
The median income for a household in the county is $35,243, and the median income for a family is $41,653. Males have a median income of $27,493 versus $21,781 for females. The per capita income for the county is $16,532. 12.00% of the population and 9.20% of families are below the poverty line. Out of the total population, 15.20% of those under the age of 18 and 6.70% of those 65 and older are living below the poverty line.
CassCounty was formed in 1837 out of Morgan County.
It was named in honor of Lewis Cass, a general in the War of 1812, Governor of the Michigan Territory, and United States Secretary of State in 1860.
In the county the population was spread out with 25.40% under the age of 18, 8.40% from 18 to 24, 27.80% from 25 to 44, 22.70% from 45 to 64, and 15.70% who were 65 years of age or older.
John married in Morgan County, Illinois 12 Oct to Nancy W. He was in the 1840 and 1850 census of CassCounty, Illinois and the 1860 census of Atchison County, Missouri.
CASSCOUNTY QUERY Seeking information and descendants of Duncan and Jane (Wilkie) REID, James and Cecelia (Wilkie) NEEDHAM, Thomas and Euphemia (Wilkie) CUNNINGHAM, George and Mary WILKIE, John WILKIE, and James and Mary (Needham) HILL.
CassCounty query re German immigrant family:August Zorn listed as born in CassCounty, Illinois in about 1868.