Clay County is a county in the U.S. state of South Dakota. As of the 2020 census, the population was 14,967. The county seat is Vermillion, which is also home to the University of South Dakota. The county is named for Henry Clay, American statesman, US Senator from Kentucky, and United States Secretary of State in the 19th century. Clay County comprises the Vermillion, SD Micropolitan Statistical Area, which is also included in the Sioux City-Vermillion, Iowa-SD-Nebraska Combined Statistical Area.
Union County is the southernmost county in the U.S. state of South Dakota. As of the 2020 census, the population was 16,811, making it the 13th most populous county in South Dakota. Its county seat has been Elk Point since April 30, 1865. Originally named Cole County, its name was changed to Union on January 7, 1864, because of Civil War sentiment.
Turner County is a county in the U.S. state of South Dakota. As of the 2020 census, the population was 8,673. Its county seat is Parker. The county was established in 1871, and was named for Dakota Territory official John W. Turner.
Minnehaha County is a county on the eastern border of the state of South Dakota. As of the 2020 census, the population was 197,214, making it the state's most populous county. It contains over 20% of the state's population. Its county seat is Sioux Falls, South Dakota's most populous city. The county was created in 1862 and organized in 1868. Its name was derived from the Sioux word Mnihaha, meaning "rapid water," or "waterfall".
Lincoln County is a county in the U.S. state of South Dakota. As of the 2020 census, the population was 65,161, making it the third most populous county in South Dakota. Its county seat is Canton. The county was named for Abraham Lincoln, 16th President of the United States. Lincoln County is included in the Sioux Falls, SD, Metropolitan Statistical Area. It is one of the top 10 fastest-growing counties in the United States in terms of rate of population increase, rate of housing unit increase, and many other factors. This is due to the southward growth of Sioux Falls, and the expansion of its suburbs.
Corson County is a county in the U.S. state of South Dakota. As of the 2020 census, the population was 3,902. Its county seat is McIntosh. The county was named for Dighton Corson, a native of Maine, who came to the Black Hills in 1876, and in 1877 began practicing law at Deadwood.
Yellow Medicine County is a county in the southwestern part of the U.S. state of Minnesota. Its eastern border is formed by the Minnesota River. As of the 2020 census, the population was 9,528. Its county seat is Granite Falls.
Rock County is a county located in the southwestern corner of the U.S. state of Minnesota. According to the 2020 census, its population was 9,704. The county seat is Luverne. It is located within the Sioux Falls MSA.
FlandreauFLAN-droo is a city in and county seat of Moody County, South Dakota, United States. The population was 2,372 at the 2020 census. It was named in honor of Charles Eugene Flandrau, a judge in the territory and state of Minnesota. He is credited with saving the community of New Ulm, Minnesota, from destruction during conflict with the Sioux tribe in 1862.
Elk Point is a city in and the county seat of Union County, South Dakota, United States. The population was 2,149 as of the 2020 census.
Bismarck–Mandan, colloquially referred to as BisMan, is the metropolitan area composed of Burleigh, Morton, and Oliver counties in the state of North Dakota.
The Sioux City metropolitan statistical area, as defined by the United States Census Bureau, is an area consisting of four counties in three states – Iowa, Nebraska, and South Dakota, anchored by the city of Sioux City, Iowa. As of the 2020 census, the MSA had a population of 145,940. Plymouth County, Iowa, was removed from the definition of the MSA prior to the 2020 census.
The Charleston Metropolitan Statistical Area, as defined by the United States Census Bureau, is an area consisting of three counties in West Virginia, anchored by the city of Charleston. It is the largest metropolitan area entirely within the state of West Virginia. The Huntington Metro Area adds to the Charleston–Huntington, WV-OH-KY CSA and spans three states, while the core county of the Charleston area, Kanawha County, is more populous than the West Virginia portion of the Huntington area.
The Glens Falls Metropolitan Statistical Area, as defined by the United States Census Bureau, is an area consisting of two counties in Upstate New York, anchored by the city of Glens Falls. It is considered to be a part of the greater Capital District. As of the 2010 census, the MSA had a population of 128,942.
The Weirton–Steubenville, WV–OH Metropolitan Statistical Area, also known as the Upper Ohio Valley, is a metropolitan statistical area consisting of two counties in the Northern Panhandle of West Virginia and one in Ohio, anchored by the cities of Weirton and Steubenville. As of the 2020 census, the MSA had a population of 116,903. This puts it at 334th largest in the United States. It is also included in the larger Pittsburgh–New Castle–Weirton, PA–OH–WV Combined Statistical Area.
The Rapid City, SD metropolitan area, as defined by the United States Census Bureau. Anchored by the city of Rapid City, the area corresponds to the entirety of Pennington and Meade counties in the state of South Dakota, though the Rapid City market area extends well beyond those counties and into Nebraska, Montana, Wyoming, and North Dakota. The population was 139,074 at the 2020 census. According to 2022 census estimates, the MSA is estimated to have a population of 145,159.
The Rockford Metropolitan Statistical Area, as defined by the United States Census Bureau, is an area consisting of four counties in north-central Illinois, anchored by the city of Rockford. As of the 2010 census, the MSA had a population of 349,431. The Rockford MSA abuts the southern portions of the Janesville-Beloit MSA and the Chicago MSA. It forms the main part of the larger Rockford–Freeport–Rochelle Combined Statistical Area.
The Waterloo–Cedar Falls Metropolitan Statistical Area, as defined by the United States Census Bureau, is an area consisting of three counties in Iowa, anchored by the cities of Waterloo and Cedar Falls. As of the 2000 census, the MSA had a population of 163,706 . As of the 2010 Census, the MSA had a population of 169,484.
The Harrison Micropolitan Statistical Area, as defined by the United States Census Bureau, is an area consisting of two counties in the U.S. state of Arkansas, anchored by the city of Harrison.
The St. Cloud Metropolitan Statistical Area, as defined by the United States Census Bureau, consists of two counties in central Minnesota, anchored by the city of St. Cloud. In the 2010 census, the MSA had a population of 201,093; a July 1, 2012, Census Bureau estimate placed the population at 190,014. As of the 2020 census, the population was 199,671, in 2022, 201,868.
United States 
South Dakota 
Minnesota 
