| antarctica | | uncultured methanococcoides sp. | species | 3 | 0 |
| brazil | | uncultured methanococcoides sp. | species | 6 | 0 |
| germany | saxony-anhalt | uncultured methanococcoides sp. | species | 5 | 0 |
| india | | uncultured methanococcoides sp. | species | 5 | 0 |
| italy | | uncultured methanococcoides sp. | species | 1 | 0 |
| italy | campania region | methanococcoides | genus | 0 | 1 |
| mexico | | uncultured methanococcoides sp. | species | 1 | 0 |
| mexico | baja california | methanococcoides | genus | 0 | 1 |
| mexico | baja california sur | methanococcoides | genus | 0 | 1 |
| mexico | baja california sur | uncultured methanococcoides sp. | species | 3 | 0 |
| mexico | guerrero | methanococcoides | genus | 0 | 1 |
| nigeria | | uncultured methanococcoides sp. | species | 18 | 0 |
| spain | andalusia | methanococcoides sp. enrichment culture clone 4.17a arc band 2 | species | 1 | 0 |
| spain | andalusia | methanococcoides sp. enrichment culture clone 4.17b arc band 2 | species | 1 | 0 |
| spain | andalusia | methanococcoides sp. enrichment culture clone 4.17c arc band 1 | species | 1 | 0 |
| spain | andalusia | methanococcoides sp. enrichment culture clone 4.17d arc band 1 | species | 1 | 0 |
| ukraine | autonomous republic of crimea | methanococcoides | genus | 0 | 1 |
| united states | | methanococcoides sp. ebm-47 | species | 54 | 0 |
| united states | alaska | methanococcoides | genus | 0 | 1 |
| united states | alaska | methanococcoides alaskense | species | 10 | 0 |
| united states | california | methanococcoides methylutens | species | 32 | 0 |
| united states | oregon | methanococcoides | genus | 0 | 1 |