August Wilhelm Thienemann (24 April 1830 – 5 November 1884) was a German pastor, ornithologist and conservationist.
From 1876 the journal Sächsisch-Thüringischen Vereins für Vogelkunde und Vogelschutz zu Halle was edited by Eugen Dietrich Adalbert von Schlechtendal (1830–1881).
After his death, Thienemann took over editing of the journal which had then merged into the German association for the protection of birds.
He produced a mural for a school in Weissenfels dealing with birds and gave talks around Germany.
In 1884 he was asked by the minister of agriculture to represent Prussia at the International Ornithological Congress at Vienna but Theinemann was unable to go due to poor health.