The House of Sponheim or Spanheim was a medieval German noble family, which originated in Rhenish Franconia. They were immediate Counts of Sponheim until 1437 and Dukes of Carinthia from 1122 until 1269. Its cadet branches ruled in the Imperial County of Ortenburg-Neuortenburg and various Sayn-Wittgenstein states until 1806.

The County of Sponheim was an independent territory in the Holy Roman Empire that lasted from the 11th century until the early 19th century. The name comes from the municipality of Sponheim, where the counts had their original residence.