James Gadderar (1655–1733) was a clergyman of the Scottish Episcopal Church.
In November 1721 he traveled to Aberdeen and acted as Bishop Archibald Campbell's vicar-depute.
Gadderar supported the practice of primitive 'usages' in the diocese, which brought him into a dispute with the College of Bishops at Edinburgh.
After the resignation of Bishop Archibald Campbell in 1725, he was made Bishop of Aberdeen, remaining there until his death.
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