Jefferson County is a county located in the state of Iowa. As of 2000, the population is 16,181. Its county seat is Fairfield, Iowa6.
Geography
According to the U.S. Census Bureau, the county has a total area of 1,131 km˛ (437 mi˛). 1,128 km˛ (435 mi˛) of it is land and 4 km˛ (1 mi˛) of
it is water. The total area is 0.32% water.
Demographics
As of the census2 of 2000, there are 16,181 people, 6,649 households, and 4,281
families residing in the county. The population density is 14/km˛ (37/mi˛). There are 7,241
housing units at an average density of 6/km˛ (17/mi˛). The racial makeup of the
county is 96.02% White, 0.64% Black or African American, 0.17% Native American, 1.70% Asian, 0.04% Pacific Islander, 0.53% from other races, and 0.91% from two or more races. 1.84% of the population are Hispanic or Latino of any race.
There are 6,649 households out of which 31.10% have children under the age of
18 living with them, 53.10% are married couples living together, 8.00% have a female
householder with no husband present, and 35.60% are non-families. 30.40% of all
households are made up of individuals and 10.70% 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 2.93.
In the county the population is spread out with 24.40% under the age of 18,
7.60% from 18 to 24, 24.40% from 25 to 44, 29.80% from 45 to 64, and 13.80% who
are 65 years of age or older. The median age is 41 years. For every 100 females
there are 95.90 males. For every 100 females age 18 and over, there are 93.60
males.
The median income for a household in the county is $33,851, and the median
income for a family is $43,819. Males have a median income of $32,066 versus
$22,479 for females. The per capita income for the county is $19,579. 10.90% of the
population and 7.40% of families are below the poverty line. Out of the total population, 12.40% of those
under the age of 18 and 9.00% of those 65 and older are living below the
poverty line.
