Twin Brooks, SD has a population of 58 and is the 27,983rd largest city in the United States. The population density is 143 per sq mi which is 1223% higher than the South Dakota average and 58% higher than the national average. The median age in Twin Brooks is 48 which is approximately 29% higher than the South Dakota average of 37. In Twin Brooks, 86% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 62% of Twin Brooks residents were born in South Dakota, 38% were born out of state, 0% were born outside of the United States and 0% were foreign born.
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The population density in Twin Brooks is 1223% higher than South Dakota.
The median age in Twin Brooks is 29% higher than South Dakota.
In Twin Brooks 100.00% of the population is White.
In Twin Brooks 0.00% of the population is Black or African American.