| Named By: | Fritsch in 1879 |
| Time Period: | Late Carboniferous 304.2-299 Ma |
| Location: | Germany |
| Size: | Unavailable |
| Diet: | Carnivore |
| Fossil(s): | Partial remains |
| Classification: | | Chordata | Synapsida | Pelycosauria | Sphenacodontidae | |
Macromerion is an extinct genus of the Chordata Phylum of non-mammalian synapsid class of the Sphenacodontidae family from the Late Carboniferous of Germany.