Geography According to the U.S. Census Bureau, the county has a total area of 2,349 km² (907 mi²). 2,307 km² (891 mi²) of it is land and 42 km² (16 mi²) of it is water. The total area is 1.80% water.
Demographics As of the census of 2000, there are 319,250 people, 130,687 households, and 84,293 families residing in the county. The population density is 138/km² (358/mi²). There are 144,686 housing units at an average density of 63/km² (162/mi²). The racial makeup of the county is 96.63% White, 1.69% African American, 0.09% Native American, 0.58% Asian, 0.01% Pacific Islander, 0.43% from other races, and 0.57% from two or more races. 1.16% of the population are Hispanic or Latino of any race.
There are 130,687 households out of which 26.50% have children under the age of 18 living with them, 48.80% are married couples living together, 11.50% have a female householder with no husband present, and 35.50% are non-families. 31.30% of all households are made up of individuals and 16.00% have someone living alone who is 65 years of age or older. The average household size is 2.34 and the average family size is 2.95.
In the county, the population is spread out with 21.00% under the age of 18, 8.10% from 18 to 24, 27.20% from 25 to 44, 24.00% from 45 to 64, and 19.70% who are 65 years of age or older. The median age is 41 years. For every 100 females there are 93.00 males. For every 100 females age 18 and over, there are 89.50 males.
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