Johannes Winnertz
Born	(1800-02-11)11 February 1800
Died	24 July 1890(1890-07-24) (aged 90)
Nationality	German
Occupation	entomologist
Known for	specialising in Diptera

Johannes Winnertz (11 February 1800 – 24 July 1890) was a German entomologist specialising in Diptera.

He was a dealer in Krefeld.

• Beitrag zur Kenntniss der Gattung Ceratopogon Meigen. 1852
• Beitrag zu einer Monographie der Gallmücken. 1853
• Beitrag zu einer Monographie der Pilzmücken. 1863
• Beitrag zu einer Monographie der Sciarinen. Wien, 1867

Winnertz' collections of Diptera are in Senckenberg Museum, Naturhistorisches Museum Vienna and the Natural History Museum, Bonn.

• Osten-Sacken, C. R. 1903: Record of my life and work in entomology. - Cambridge (Mass.)