Johann Spenner also Johann Spender (died 5 December 1503) was a Roman Catholic prelate who served as Auxiliary Bishop of Cologne (1482–1503).^[1]

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Johann Spenner was appointed a priest in the Order of Friars Minor.^[2] On 4 November 1482, he was appointed during the papacy of Pope Sixtus IV as Auxiliary Bishop of Cologne and Titular Bishop of Cyrene.^[1][2] On 18 November 1482, he was consecrated bishop by Stefan Teglatije, Archbishop of Bar, with Giuliano Maffei, Bishop of Bertinoro, serving as co-consecrator.^[2] He served as Auxiliary Bishop of Cologne until his death on 5 December 1503.^[1][2]