Johannes Letzner (29 November 1531 – 16 February 1613) was a Renaissance-era German Protestant priest and historian of Lower Saxony, in particular of Brunswick-Lüneburg. Letzner studied briefly at Wittenberg University in 1550–1551 before moving to Uslar as cantor and school master, and later as vicar to (1553) Langenholtensen (1564), Lüthorst (1583), Iber (1589) and finally to where he retired in 1610 and died three years later.