Johann Friedrich Mayer (6 December 1650 – 30 March 1712) was a German Lutheran theologian and professor of theology at Wittenberg University.

On 29 January 1672, he was made Saturday preacher (assistant pastor) in Leipzig, and later that year he was appointed superintendent in Leisnig.

[2] This post entailed serving as second preacher at the Wittenberg Castle Church and administering the state scholarships.

In his inaugural address he argued, with reference to Philipp Spener's Pia desideria [de], that theology should pursue piety rather than engaging in speculation.

He was active at the Hamburg Academic Gymnasium [de], was briefly professor at the University of Kiel, and was made a Senior Church Councillor (Oberkirchenrat) of Holstein.

In addition, in 1691 King Charles XI of Sweden made him Senior Church Councillor (Oberkirchenrat) of the German territory under Swedish rule.

In 1698 he was Consistorial Councillor to Anna Dorothea, Abbess of Quedlinburg and was also involved in theological affairs in Berlin.

Aided by his already voluminous library and art collection, Mayer developed extensive activity as an author in Greifswald.

Despite his loyalty to his Swedish master, after the entry of the enemy army on 25 January 1712, he was supposed to hold a prayer service for Peter the Great and Augustus II the Strong in St. Nicholas's church, where he was supposed to pray for the permanent expulsion of his Swedish employer.

In 1742, the organ was installed in the Gutskapelle Deyersdorf; the box and two original registers by Arp Schnitger are still intact.