Marshall County, Illinois

Marshall County is a located in the  of. As of, the population is 13,180. Its is.

Geography
According to the, the county has a total area of 1,032 (399 ). 1,000 km² (386 sq mi) of it is land and 32 km² (12 sq mi) of it (3.12%) is water.

Adjacent Counties

 * - north
 * - east
 * - south
 * - southwest
 * - west
 * - northwest

History
Marshall County was formed in out of. It was named in honor of, Chief Justice of the , who died in 1835.

Demographics
As of the of 2000, there were 13,180 people, 5,225 households, and 3,720 families residing in the county. The was 13/km² (34/sq mi). There were 5,914 housing units at an average density of 6/km² (15/sq mi). The racial makeup of the county was 98.19%, 0.35% or , 0.22% , 0.25% , 0.01% , 0.25% from , and 0.74% from two or more races. 1.05% of the population were or  of any race.

There were 5,225 households out of which 29.60% had children under the age of 18 living with them, 60.80% were living together, 6.70% had a female householder with no husband present, and 28.80% were non-families. 25.00% of all households were made up of individuals and 12.60% had someone living alone who was 65 years of age or older. The average household size was 2.47 and the average family size was 2.95.

In the county the population was spread out with 23.50% under the age of 18, 7.20% from 18 to 24, 25.60% from 25 to 44, 24.90% from 45 to 64, and 18.80% who were 65 years of age or older. The median age was 41 years. For every 100 females there were 96.00 males. For every 100 females age 18 and over, there were 94.70 males.

The median income for a household in the county was $41,576, and the median income for a family was $48,061. Males had a median income of $35,765 versus $21,452 for females. The for the county was $19,065. About 3.80% of families and 5.60% of the population were below the, including 6.90% of those under age 18 and 5.40% of those age 65 or over.