Oacoma, South Dakota

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Oacoma is a town in Lyman County, South Dakota, United States. The population was 390 at the 2000 census. Oacoma is located on the west bank of the Missouri River, across from Chamberlain.



Oacoma is located at 43°48′15″N 99°22′49″W / 43.804117°N 99.380157°W / 43.804117; -99.380157.[4]

According to the United States Census Bureau, the town has a total area of 11.5 km2 (4.4 mi2). 5.2 km2 (2.0 mi2) of it is land and 6.3 km2 (2.4 mi2) of it (54.38%) is water.

Oacoma has been assigned the ZIP code 57365 and the FIPS place code 46180.


As of the census[2] of 2000, there were 390 people, 169 households, and 111 families residing in the town. The population density was 192.8 people per square mile (74.5/km2). There were 188 housing units at an average density of 92.9/sq mi (35.9/km2). The racial makeup of the town was 94.36% White, 3.33% Native American, and 2.31% from two or more races. Hispanic or Latino of any race were 0.26% of the population.

There were 169 households out of which 33.1% had children under the age of 18 living with them, 50.9% were married couples living together, 9.5% had a female householder with no husband present, and 34.3% were non-families. 29.0% of all households were made up of individuals and 8.3% had someone living alone who was 65 years of age or older. The average household size was 2.31 and the average family size was 2.86.

In the town the population was spread out with 26.2% under the age of 18, 5.4% from 18 to 24, 30.3% from 25 to 44, 27.7% from 45 to 64, and 10.5% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 107.4 males. For every 100 females age 18 and over, there were 102.8 males.

The median income for a household in the town was $36,719, and the median income for a family was $44,250. Males had a median income of $26,500 versus $18,750 for females. The per capita income for the town was $17,206. About 8.4% of families and 7.4% of the population were below the poverty line, including 8.7% of those under age 18 and 16.7% of those age 65 or over.

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