dates to the War of 1812. Lee County was the location of the Half-Breed Tract, established by treaty in 1824. Allocations of land were made to American Indian descendants of European fathers and Indian mothers at this tract. Originally the land was to be held in common. Some who had an allocation lived in cities, where they hoped to make better livings. Lee County as a named entity was formed on December 7, 1836, under the jurisdiction of Wisconsin Territory. It would become a part of Iowa Territory when it was formed on July 4, 1838. Large-scale European-American settlement in the area began in 1839, after Congress allowed owners to sell land individually. Members of the Church of Christ fled persecutions in Missouri to settle in Illinois and Iowa. Nauvoo, across the border in Hancock County, Illinois, became the main center of Latter-day Saints settlement, but there was also a Latter Day Saints stake organized in Lee County under the direction of John Smith, the uncle of Joseph Smith, land that was sold to them by Isaac Galland in 1839. Lee has two county seats — Fort Madison and Keokuk. The latter was established in 1847 when disagreements led to a second court jurisdiction. Lee County's population grew to about 19,000 in 1850, the first US census, to 37,000 per the 3rd census in 1870, peaking at 44,000 people in 1960. It has continuously decreased since and as of 2010, 35,862 people lived there, comparable to the years between 1860 and 1870.
Name
There is no agreement about the derivation of the name "Lee." It has been variously proposed that the county was named for Marsh, Delevan & Lee, of Albany, New York, and the 'New York Land Company', who owned extensive interests in the Half-Breed Tract in the 1830s; Robert E. Lee, who surveyed the Des Moines Rapids; or Albert Lea, who helped explore the interior of Iowa.
Geography
According to the U.S. Census Bureau, the county has a total area of, of which is land and is water. The lowest point in the state of Iowa is located on the Mississippi River in Keokuk in Lee County, where it flows out of Iowa and into Missouri and Illinois.
As of the census of 2000, there were 38,052 people, 15,161 households, and 10,248 families residing in the county. The population density was 74 people per square mile. There were 16,612 housing units at an average density of 32 per square mile. The racial makeup of the county was 94.24% White, 2.80% Black or African American, 0.26% Native American, 0.39% Asian, 0.06% Pacific Islander, 1.03% from other races, and 1.21% from two or more races. 2.37% of the population were Hispanic or Latino of any race. There were 15,161 households out of which 30.40% had children under the age of 18 living with them, 53.70% were married couples living together, 10.30% had a female householder with no husband present, and 32.40% were non-families. 28.30% of all households were made up of individuals and 13.50% had someone living alone who was 65 years of age or older. The average household size was 2.41 and the average family size was 2.93. In the county, the population was spread out with 24.40% under the age of 18, 7.80% from 18 to 24, 26.70% from 25 to 44, 24.60% from 45 to 64, and 16.50% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 97.90 males. For every 100 females age 18 and over, there were 96.40 males. The median income for a household in the county was $36,193, and the median income for a family was $42,658. Males had a median income of $32,286 versus $21,821 for females. The per capita income for the county was $18,430. About 7.10% of families and 9.70% of the population were below the poverty line, including 12.60% of those under age 18 and 9.60% of those age 65 or over.
2010 census
The 2010 census recorded a population of 35,862 with a population density of. There were 16,205 housing units, of which only 14,610 were occupied.
In recent presidential elections, Lee County had a strong Democratic lean, voting for the party's candidate in every election from 1984 to 2012. In 2016 however, the county swung hard to vote for Republican Donald Trump by a wide margin, a swing of over 31 points compared to 2012.
