Iatan, first settled by John Dougherty in 1837, was one of the first communities to be established after the Platte Purchase allowed white settlement on former Native American land (which was proclaimed in February 1837). It was initially an important trading port on the Missouri River but was soon overtaken by Weston, Missouri five miles (8 km) to the south and St. Joseph, Missouri to the north.
The Iatan 1 plant which opened in 1980 has a 651 megawatt capacity and had a high chimney when it opened. The tower is higher than any occupied building in the state including the Gateway Arch.
The Iatan 2 plant is scheduled to open in 2010 and will generate 850 Megawatts with a capacity to burn 494 tons of coal per hour. The new plant is to have a lower high mechanical cooling tower.
According to the United States Census Bureau, the village has a total area of 0.0 square miles (0.1 km²), all of it land.
There were 22 households out of which 31.8% had children under the age of 18 living with them, 40.9% were married couples living together, 13.6% had a female householder with no husband present, and 40.9% were non-families. 31.8% of all households were made up of individuals and 4.5% 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 3.31.
In the village the population was spread out with 24.1% under the age of 18, 7.4% from 18 to 24, 27.8% from 25 to 44, 31.5% from 45 to 64, and 9.3% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 100.0 males. For every 100 females age 18 and over, there were 105.0 males.
The median income for a household in the village was $35,625, and the median income for a family was $36,250. Males had a median income of $22,188 versus $10,625 for females. The per capita income for the village was $8,895. There were 25.0% of families and 16.4% of the population living below the poverty line, including 15.6% of under eighteens and none of those over 64.