thumb|Blackwater railroad station
Blackwater is a city in northwest Cooper County, Missouri, United States located along the Blackwater River, from which it takes its name. As of the 2020 census, Blackwater had a population of 170.
Founded by the Missouri Pacific Railroad, Blackwater's economy was largely defined by freight until the mid-twentieth century. With the railroad's decline, Blackwater's status as a boom town came to an end, and the population thinned considerably. The city has preserved a number of historic, rail-related structures that have been repurposed as museums, hotels, or antique shops.
Many parts of Blackwater's commercial and residential districts are listed on the National Register of Historic Places.
History
Blackwater was platted in 1887, although it had long functioned as a trading point. A post office called Blackwater has been in operation since 1873.
In the late nineteenth century, the Missouri Pacific Railroad sought to construct a "River Route" to link important sites like Kansas City, Boonville, and Jefferson City. A number of smaller towns and villages sprang up among the route, which provided a vital economic lifeline to otherwise isolated areas.
As one of these smaller towns, Blackwater retained a small but economically stable population. First consisting of railroad workers, the discovery of a rock quarry several miles outside the town provided a new set of economic opportunities, drawing miners to the area. In subsequent decades, the town would develop drugstores, banks, hardware stores, millinery shops, cafes, a hotel, lumber yard, livery stables, a creamery, meat market, blacksmiths, and saloons.
Blackwater Commercial Historic District, Blackwater Residential Historic District, and Imhoff Archeological Site are listed on the National Register of Historic Places.
Geography
Blackwater is located along Missouri Route K two miles north of I-70. The site is on the south bank of the Blackwater River, and the community of Nelson in adjacent Saline County lies two miles to the west-northwest. Lamine is six miles to the southeast on Missouri Route 41.
According to the United States Census Bureau, the city has a total area of , all land.
Demographics
2010 census
As of the census of 2010, there were 162 people, 64 households, and 45 families living in the city. The population density was . There were 87 housing units at an average density of . The racial makeup of the city was 95.1% White, 1.9% African American, 0.6% Native American, and 2.5% from two or more races. Hispanic or Latino of any race were 1.9% of the population.
There were 64 households, of which 35.9% had children under the age of 18 living with them, 53.1% were married couples living together, 12.5% had a female householder with no husband present, 4.7% had a male householder with no wife present, and 29.7% were non-families. 25.0% of all households were made up of individuals, and 14% had someone living alone who was 65 years of age or older. The average household size was 2.53 and the average family size was 3.02.
The median age in the city was 38.3 years. 25.3% of residents were under the age of 18; 10.6% were between the ages of 18 and 24; 22.1% were from 25 to 44; 27.2% were from 45 to 64; and 14.8% were 65 years of age or older. The gender makeup of the city was 48.1% male and 51.9% female.
2000 census
As of the census