Geography
Clarksville is located at 42°46'58" North, 92°40'11" West (42.782665, -92.669842)1.
According to the United States Census Bureau, the city has a total area of 3.6 km² (1.4 mi²). 3.5 km² (1.4 mi²) of it is land and 0.72% is water.
Demographics
As of the census of 2000, there are 1,441 people, 581 households, and 393 families residing in the city. The population density is 409.1/km² (1,056.0/mi²). There are 611 housing units at an average density of 173.5/km² (447.8/mi²). The racial makeup of the city is 99.03% White, none African American, 0.07% Native American, 0.21% Asian, none Pacific Islander, 0.14% from other races, and 0.56% from two or more races. 0.35% of the population are Hispanic or Latino of any race.
There are 581 households out of which 32.9% have children under the age of 18 living with them, 55.2% are married couples living together, 8.8% have a female householder with no husband present, and 32.2% are non-families. 28.7% of all households are made up of individuals and 17.7% have someone living alone who is 65 years of age or older. The average household size is 2.38 and the average family size is 2.91.
In the city the population is spread out with 25.0% under the age of 18, 6.4% from 18 to 24, 26.6% from 25 to 44, 20.5% from 45 to 64, and 21.6% who are 65 years of age or older. The median age is 39 years. For every 100 females there are 85.2 males. For every 100 females age 18 and over, there are 82.0 males.
The median income for a household in the city is $32,857, and the median income for a family is $37,457. Males have a median income of $28,795 versus $20,821 for females. The per capita income for the city is $14,811. 9.7% of the population and 8.2% of families are below the poverty line. Out of the total people living in poverty, 13.3% are under the age of 18 and 9.6% are 65 or older.