Piatt County, Illinois

Piatt County is a located in the  of. As of, the population is 16,365. Its is.

Geography
According to the, the county has a total area of 1,140 (440 ). 1,140 km² (440 sq mi) of it is land and 1 km² (0 sq mi) of it (0.07%) is water.

Adjacent Counties

 * - north
 * - east
 * - southeast
 * - south
 * - southwest
 * - west

History
Piatt County was formed in 1841 from and. It was named after James A. Piatt, a local resident instrumental in formation of the county.

Illinois Power Company was a major electric utility in Central Illinois, centered in, to the west of Piatt County. At one time, Illinois had a "personal property tax", an levied by the counties on property that was not real estate. The personal property tax was a major expense for the electric utilities, since their generators and transmission lines were "personal property". Under Illinois law, a corporation, such as Illinois Power, paid personal property tax to the county in which the corporate headquarters was located. Because Piatt County offered a low tax rate, Illinois Power moved its corporate headquarters to that county. This allowed Piatt County to tax utility assets over half of the State, providing a rich source of revenue which was responsible for much of the wealth of this tiny county.

Demographics
As of the of 2000, there were 16,365 people, 6,475 households, and 4,726 families residing in the county. The was 14/km² (37/sq mi). There were 6,798 housing units at an average density of 6/km² (15/sq mi). The racial makeup of the county was 98.83%, 0.24% or , 0.08% , 0.13% , 0.02% , 0.14% from , and 0.57% from two or more races. 0.62% of the population were or  of any race.

There were 6,475 households out of which 32.60% had children under the age of 18 living with them, 63.30% were living together, 6.80% had a female householder with no husband present, and 27.00% were non-families. 23.70% of all households were made up of individuals and 11.80% had someone living alone who was 65 years of age or older. The average household size was 2.50 and the average family size was 2.96.

In the county the population was spread out with 25.10% under the age of 18, 6.80% from 18 to 24, 27.60% from 25 to 44, 25.00% from 45 to 64, and 15.50% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 95.40 males. For every 100 females age 18 and over, there were 91.90 males.

The median income for a household in the county was $45,752, and the median income for a family was $52,218. Males had a median income of $36,762 versus $23,606 for females. The for the county was $21,075. About 3.60% of families and 5.00% of the population were below the, including 4.80% of those under age 18 and 6.20% of those age 65 or over.