Grobiņa (German: Seeburg, Seleburg) is a town in western Latvia, eleven kilometers east of Liepāja. It was founded by the Teutonic Knights in the 13th century. Some ruins of their castle are still visible. The town was chartered in 1695.
During the Early Middle Ages, Grobiņa (or Grobin) was the most important political centre on the territory of Latvia. There was a centre of Scandinavian settlement on the Baltic Sea, comparable in many ways to Hedeby and Birka but probably predating them both. About 3,000 surviving burial mounds contain the most impressive remains of the Vendel Period in Eastern Europe.
The Viking settlement at Grobin was excavated by Birger Nerman in 1929 and 1930. Nerman found remains of an earthernwork stronghold, which had been protected on three sides by the Alanda River. To the period between ca. 650 and ca. 800 may be dated three Vendel Period cemeteries, one of them military in character and analogous to similar cemeteries in Mälaren Valley in Central Sweden, while two others indicate that there was "a community of Gotlanders who were carrying on peaceful pursuits behind the shield of the Swedish military".