John I, Count of Sponheim-Starkenburg
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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.
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{{Succession box
| before = Gottfried III
| title = Count of Sponheim
| years = 1218-1266
| after = Henry I
}}
{{Succession box
| before = Adelheid
| title = Count of Sayn
| years = 1263-1266
| after = Gottfried I
}}
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Category:Year of birth uncertain
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