Aberdeen is a city in and the county seat of Brown County, South Dakota, United States, about 125 mi (200 km) northeast of Pierre. Settled in 1880, it was incorporated in 1882. The city population was 26,091 at the 2010 census. The American News is the local newspaper. It is the home of Northern State University (NSU), and Presentation College (PC).

Aberdeen is the principal city of the Aberdeen Micropolitan Statistical Area, which includes all of Brown and Edmunds counties and has a population of 40,602 in 2010.

Aberdeen is located in northeastern South Dakota, in the James River valley, approximately 11 miles (18 km) west of the river. The James River enters northeastern South Dakota in Brown County, where it is dammed to form two reservoirs northeast of Aberdeen. The city is bisected by Moccasin Creek, a slow-moving waterway which flows south and then northeast to the James River.

According to the United States Census Bureau, the city has a total area of 13.0 square miles (34 km²), of which, 13.0 square miles (34 km²) of it is land and 0.1 square miles (0.26 km²) of it (0.54%) is water.

Coordinates: 57°09′09″N 2°06′36″W / 57.1526°N 2.1100°W / 57.1526; -2.1100

Aberdeen ⁱ/æbərˈdiːn/ (Scots: Aiberdeen  listen (help·info); Scottish Gaelic: Obar Dheathain [ˈopər ˈʝɛhɪn]) is Scotland's third most populous city, one of Scotland's 32 local government council areas and the United Kingdom's 29th most populous city, with an official population estimate of 220,420.

Nicknames include the Granite City, the Grey City and the Silver City with the Golden Sands. During the mid-18th to mid-20th centuries, Aberdeen's buildings incorporated locally quarried grey granite, whose mica deposits sparkle like silver. The city has a long, sandy coastline. Since the discovery of North Sea oil in the 1970s, other nicknames have been the Oil Capital of Europe or the Energy Capital of Europe. The area around Aberdeen has been settled since at least 8,000 years ago, when prehistoric villages lay around the mouths of the rivers Dee and Don.

Aberdeen received Royal Burgh status from King David I (1124–53), transforming the city economically. The city's two universities, the University of Aberdeen, founded in 1495, and The Robert Gordon University, which was awarded university status in 1992, make Aberdeen the educational centre of the north-east. The traditional industries of fishing, paper-making, shipbuilding, and textiles have been overtaken by the oil industry and Aberdeen's seaport. Aberdeen Heliport is one of the busiest commercial heliports in the world and the seaport is the largest in the north-east of Scotland.

South Dakota (ⁱ/ˌsaʊθ dəˈkoʊtə/) is a state located in the Midwestern region of the United States. It is named after the Lakota and Dakota Sioux American Indian tribes. South Dakota is the 17th most extensive, but the 5th least populous and the 5th least densely populated of the 50 United States. Once the southern portion of the Dakota Territory, South Dakota became a state on November 2, 1889. Pierre is the state capital and Sioux Falls, with a population of nearly 160,000, is South Dakota's largest city.

South Dakota is bordered by the states of North Dakota, Minnesota, Iowa, Nebraska, Wyoming, and Montana. The state is bisected by the Missouri River, dividing South Dakota into two geographically and socially distinct halves, known to residents as "East River" and "West River". Eastern South Dakota is home to most of the state's population, and fertile soil in this area is used to grow a variety of crops. West of the Missouri, ranching is the predominant agricultural activity, and the economy is more dependent on tourism and defense spending.