Adams County is a county located in the U.S. state of Illinois. As of 2000, the population is 68,277. Its name is in honor of the sixth President of the United States, John Quincy Adams. Its county seat is Quincy, Illinois6.
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According to the U.S. Census Bureau, the county has a total area of 2,257 km² (871 mi²). 2,219 km² (857 mi²) of it is land and 38 km² (15 mi²) of it is water. The total area is 1.68% water.
As of the census2 of 2000, there are 68,277 people, 26,860 households, and 17,996 families residing in the county. The population density is 31/km² (80/mi²). There are 29,386 housing units at an average density of 13/km² (34/mi²). The racial makeup of the county is 95.10% White, 3.07% Black or African American, 0.16% Native American, 0.40% Asian, 0.01% Pacific Islander, 0.31% from other races, and 0.95% from two or more races. 0.83% of the population are Hispanic or Latino of any race.
There are 26,860 households out of which 31.10% have children under the age of 18 living with them, 54.20% are married couples living together, 9.80% have a female householder with no husband present, and 33.00% are non-families. 28.50% of all households are made up of individuals and 13.20% have someone living alone who is 65 years of age or older. The average household size is 2.44 and the average family size is 3.00.
In the county the population is spread out with 24.90% under the age of 18, 8.80% from 18 to 24, 26.40% from 25 to 44, 22.40% from 45 to 64, and 17.60% who are 65 years of age or older. The median age is 38 years. For every 100 females there are 92.70 males. For every 100 females age 18 and over, there are 89.70 males.
The median income for a household in the county is $34,784, and the median income for a family is $44,133. Males have a median income of $31,171 versus $21,083 for females. The per capita income for the county is $17,894. 10.00% of the population and 7.40% of families are below the poverty line. Out of the total people living in poverty, 12.00% are under the age of 18 and 8.90% are 65 or older.