Shady Grove is a census-designated place (CDP) in McIntosh County, Oklahoma, United States. The population was 199 at the 2010 census, a decrease of 14.4 percent from 229 in 2000.GeographyShady Grove is located at .According to the United States Census Bureau, the CDP has a total area of 8.0sqmi, of which 8.0sqmi is land and 0.12% is water.DemographicsAt the 2000 census, there were 185 people, 73 households, and 58 families residing in the CDP. The population density was 23.1 per square mile (8.9/km²). There were 81 housing units at an average density of 10.1/sq mi (3.9/km²). The racial makeup of the CDP was 68.65% White, 20.00% Native American, 0.54% Asian, and 10.81% from two or more races. Hispanic or Latino of any race were 0.54% of the population.There were 73 households of which 30.1% had children under the age of 18 living with them, 74.0% were married couples living together, 2.7% had a female householder with no husband present, and 20.5% were non-families. 20.5% of all households were made up of individuals and 11.0% 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 2.91.