Putnam County was established February 28, 1845, from parts ofAdair andSullivan counties. The following year a portion of Putnam was removed to form Dodge County. Both Putnam and Dodge extended nearly nine miles further north until an 1851 ruling by theSupreme Court on aborder dispute with Iowa assigned the contested land to Iowa. Both counties were left with less than the statutory minimum area for a county as set by the state legislature, so Dodge County was dissolved and its area added to Putnam.[4]
In its early years, the county seat changed frequently, often with contentious debate. Putnamville, Bryant Station (both no longer in existence), and Hartford all served until a central location called Harmony, later renamedUnionville, was chosen.[5]
In the 1860 U.S. Census Putnam County had 9,240 residents, with eighteen sawmills and three flour mills.[6] Coal had been an abundant since its earliest settlement. Following the arrival of the Burlington & Southwestern Railway in 1873, coal mining became a major industry, especially in the east of the county. At one time three railroads crossed Putnam county: the Chicago, Milwaukee and St. Paul; the Chicago, Burlington and Quincy; and the Iowa and St. Louis.[7] Putnam County lost over two-thirds of its population between 1900 and 2000 (see census data below), when the United States changed from a rural to an urban country.
According to theU.S. Census Bureau, the county has a total area of 520 square miles (1,300 km2), of which 517 square miles (1,340 km2) is land and 2.3 square miles (6.0 km2) (0.4%) is water.[8]
Putnam County, Missouri – Racial and ethnic composition Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race.
As of thecensus[23] of 2010, there were 4,979 people, 2,228 households, and 1,517 families residing in the county. Thepopulation density was 10 people per square mile (3.9 people/km2). There were 2,914 housing units at an average density of 6 per square mile (2.3/km2). The racial makeup of the county was 99.14%White, 0.06%Black orAfrican American, 0.10%Native American, 0.13%Asian, 0.10% fromother races, and 0.48% from two or more races. Approximately 0.61% of the population wereHispanic orLatino of any race.
There were 2,228 households, out of which 27.90% had children under the age of 18 living with them, 57.20% weremarried couples living together, 7.20% had a female householder with no husband present, and 31.90% were non-families. 28.70% of all households were made up of individuals, and 15.90% had someone living alone who was 65 years of age or older. The average household size was 2.32 and the average family size was 2.83.
In the county, the population was spread out, with 24.00% under the age of 18, 6.20% from 18 to 24, 24.00% from 25 to 44, 25.10% from 45 to 64, and 20.70% who were 65 years of age or older. The median age was 42 years. For every 100 females there were 96.10 males. For every 100 females age 18 and over, there were 91.90 males.
The median income for a household in the county was $26,282, and the median income for a family was $32,031. Males had a median income of $22,957 versus $18,884 for females. Theper capita income for the county was $14,647. About 13.20% of families and 16.00% of the population were below thepoverty line, including 20.60% of those under age 18 and 12.80% of those age 65 or over.
TheRepublican Party predominantly controls politics at the local level in Putnam County. Republicans hold all but one of the elected positions in the county.