John I, Count of Sponheim (born before 1206; died 1266) was a German count.
He was son of Gottfried III, and ruled from 1218 to his death.
He married a daughter of Frederick of Isenberg, among their children are Henry I, who inherited Sponheim-Starkenburg, and Gottfried I, who inherited Sayn.
This article about a member of the German nobility is a stub.
You can help Wikipedia by expanding it.