Diplocynodon is an extinct genus of alligatoroid crocodilian that lived during the Paleocene to Middle Miocene in Europe.

[3] Well preserved specimens have been found in the Messel Pit and the Geiseltal lignite deposit in Germany.

In the Eocene epoch, the German sites were either a swampy freshwater lake (Messel Pit) or a peat bog swamp (Geiseltal).

D. hantoniensis Early Priabonian United Kingdom Headon Hill Formation All specimens came from Hordwell, southern England.

D. kochi Eocene (Priabonian) Romania Cluj Limestone Formation D. muelleri[5] Middle Rupelian Spain El Talladell More than 100 are known, all from Lleida Province, Catalonia.

Diplocynodon's placement within Alligatoroidea can be shown in the cladogram below, based on a 2018 tip dating study by Lee & Yates that simultaneously used morphological, molecular (DNA sequencing), and stratigraphic (fossil age) data.