| Official Name: | Marietta, Adair County, Oklahoma |
| Settlement Type: | Census-designated place |
| Mapsize: | 260px |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Oklahoma |
| Subdivision Type2: | County |
| Subdivision Name2: | Adair |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 4.76 |
| Area Land Km2: | 4.75 |
| Area Water Km2: | 0.01 |
| Area Total Sq Mi: | 1.84 |
| Area Land Sq Mi: | 1.83 |
| Area Water Sq Mi: | 0.00 |
| Population As Of: | 2020 |
| Population Total: | 82 |
| Population Density Km2: | 17.25 |
| Population Density Sq Mi: | 44.69 |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 1145 |
| Coordinates: | 35.8478°N -94.6525°W |
| Blank Name: | FIPS code |
| Blank Info: | 40-46488[2] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2408177 |
Marietta is a census-designated place (CDP) in Adair County, Oklahoma, United States. The population was 106 at the 2010 census.[3] The community was listed as Maryetta at the 2000 census, at which time it had a population of 138.[4]
Maryetta's roots go back to the founding of an Indian Day school before Oklahoma statehood, which was replaced by a public school named Maryetta (named after Maryetta Key, daughter of Mike Key, the donor of one acre of land where the school was initially built.[5] Today Maryetta Public schools serve students from pre-k through 8th grade, with students continuing on for high school at other area schools.[6]
According to the United States Census Bureau, the CDP has a total area of 4.7km2, all land.[3]
As of the census of 2000, there were 138 people, 47 households, and 33 families residing in the CDP. The population density was 77.3/mi2. There were 49 housing units at an average density of 27.4/mi2. The racial makeup of the CDP was 39.13% White, 53.62% Native American, and 7.25% from two or more races. Hispanic or Latino of any race were 1.45% of the population.
There were 47 households, out of which 40.4% had children under the age of 18 living with them, 42.6% were married couples living together, 21.3% had a female householder with no husband present, and 27.7% were non-families. 25.5% of all households were made up of individuals, and 12.8% had someone living alone who was 65 years of age or older. The average household size was 2.94 and the average family size was 3.59.
In the CDP, the population was spread out, with 27.5% under the age of 18, 16.7% from 18 to 24, 25.4% from 25 to 44, 18.8% from 45 to 64, and 11.6% who were 65 years of age or older. The median age was 30 years. For every 100 females, there were 102.9 males. For every 100 females age 18 and over, there were 96.1 males.
The median income for a household in the CDP was $16,875, and the median income for a family was $21,250. Males had a median income of $16,667 versus $15,000 for females. The per capita income for the CDP was $7,916. There were 21.9% of families and 36.4% of the population living below the poverty line, including 68.6% of under eighteens and 40.0% of those over 64.