Hancock County is a county located in the U.S. state of Illinois. As of 2000, the population was 20,121. Its county seat is Carthage, Illinois. Hamilton is the largest city in Hancock County, with Carthage being the second largest. The county is made up of rural towns with many farmers.
Hancock County was formed, on January 13 1825, out of Pike County. It was named in honor of John Hancock, who clearly signed the Declaration of Independence.
For a brief period in the 1840s Hancock had one of Illinois' most populous cities: Nauvoo, which was then headquarters for the Church of Jesus Christ of Latter Day Saints. The LDS leader Joseph Smith, Jr. was assassinated in the county seat of Carthage in 1844. Most Mormons left Hancock county in the 1840s. Today followers of the LDS movement come, in increasing numbers, to important LDS sites in Hancock county, partly for vacation and partly for religious pilgrimage.
The original courthouse was located at Montebello. Montebello no longer exists but was between Nauvoo and Hamilton. In 1833 the state commissioned the formation of the county seat at Carthage IL which was centrally located but not well delevoped at the time. A log cabin was built to serve as the courthouse and continued to serve that purpose until 1839 when the second Carthage Courthouse was built. The original log cabin continued to serve as a school and other purposes until 1945 when it was removed.
The second courthouse cost $3,700 dollars to build and served from 1839 until 1906. It served as a location for both Stephan A. Douglas (October 11, 1858) and Abraham Lincoln (October 22, 1858) to speak to residents of the area as they were running against each other for the US Senate. In 1906 it was removed to make room for the current courthouse.
The current courthouse was dedicated October 21, 1908.
There were 8,069 households out of which 30.50% had children under the age of 18 living with them, 58.90% were married couples living together, 7.60% had a female householder with no husband present, and 30.50% were non-families. 26.90% of all households were made up of individuals and 13.80% had someone living alone who was 65 years of age or older. The average household size was 2.45 and the average family size was 2.96.
In the county the population was spread out with 24.60% under the age of 18, 7.10% from 18 to 24, 25.50% from 25 to 44, 24.50% from 45 to 64, and 18.30% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 94.20 males. For every 100 females age 18 and over, there were 90.20 males.
The median income for a household in the county was $36,654, and the median income for a family was $44,457. Males had a median income of $31,095 versus $20,680 for females. The per capita income for the county was $17,478. About 5.40% of families and 8.30% of the population were below the poverty line, including 9.90% of those under age 18 and 8.20% of those age 65 or over.