Johann Olearius may refer to:
- Johann Olearius (1611–1684) a German hymnwriter, preacher, and academic.
- Johann Gottfried Olearius (1635–1711) a German preacher and horticulturalist
- Johann Christoph Olearius (1668–1747) deacon of the Bach Church, Arnstadt
This disambiguation page lists articles about people with the same name.
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