Ravinia, SD has a population of 98 and is the 26,974th largest city in the United States. The population density is 396 per sq mi which is 3559% higher than the South Dakota average and 337% higher than the national average. The median age in Ravinia is 32 which is approximately 13% lower than the South Dakota average of 37. In Ravinia, 54% of the population over 15 years of age are married, 94% speak English and 1% speak Spanish. 80% of Ravinia residents were born in South Dakota, 20% were born out of state, 0% were born outside of the United States and 0% were foreign born.