John I of Nassau may refer to:
- John I, Bishop-Elect of Utrecht (died 1309)
- John I, Count of Nassau-Beilstein (died 1473)
- John I, Count of Nassau-Siegen (c. 1339–1416)
- John I, Count of Nassau-Weilburg (1309–1371)
This disambiguation page lists articles about people with the same name.
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