South Dakota is an expansive, sparsely populated midwestern U.S. state where rolling prairies give way to the dramatic Black Hills National Forest. Black Hills is home to 2 historical monuments carved right into towering granite peaks: Mt. Rushmore, the iconic depiction of 4 revered U.S. presidents, and Crazy Horse Memorial, a tribute to the storied Native American tribal leader.
United States Census Bureau. B01001 SEX BY AGE, 2018 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. 19 December 2019. http://www.census.gov/.
United States Census Bureau. Annual Estimates of the Resident Population: April 1, 2010 to July 1, 2019. U.S. Census Bureau, Population Division. Web. May 2020. http://www.census.gov/.