Geography The county has a total area of 1,458 km² (563 mi²). 862 km² (333 mi²) of it is land and 596 km² (230 mi²) of it is water. The total area is 40.87% water.
Demographics As of 2000, there are 123,546 people, 46,907 households, and 32,037 families residing in the county. The population density is 143/km² (371/mi²). There are 56,816 housing units at an average density of 66 persons/km² (171 persons/mi²). The racial makeup of the county is 94.82% White, 0.92% African American, 0.93% Native American, 1.50% Asian, 0.02% Pacific Islander, 0.46% from other races, and 1.35% from two or more races. 1.44% of the population are Hispanic or Latino of any race.
There are 46,907 households out of which 31.80% have children under the age of 18 living with them, 55.50% are married couples living together, 9.40% have a woman whose husband does not live with her, and 31.70% are nonfamilies. 24.10% of all households are made up of individuals and 9.20% 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 23.40% under the age of 18, 11.20% from 18 to 24, 28.30% from 25 to 44, 24.40% from 45 to 64, and 12.80% who are 65 years of age or older. The median age is 37 years. For every 100 females there are 94.20 males. For every 100 females age 18 and over, there are 91.30 males.
The median income for a household in the county is $53,103, and the median income for a family is $64,112. Males have a median income of $43,956 versus $30,659 for females. The per capita income for the county is $25,530. 7.30% of the population and 4.20% of families are below the poverty line. Out of the total people living in poverty, 7.40% are under the age of 18 and 5.60% are 65 or older.
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