| armenia | | methylococcaceae bacterium ak-k6 | species | 3 | 0 |
| australia | queensland | methylococcaceae bacterium | species | 1 | 0 |
| bangladesh | | methylococcaceae bacterium brs-k6 | species | 3 | 0 |
| belgium | walloon region | methylococcaceae bacterium m200 | species | 3 | 0 |
| canada | alberta | methylococcaceae bacterium uba6146 | species | 1 | 0 |
| india | | methylococcaceae bacterium | species | 3 | 0 |
| india | | methylococcaceae bacterium sn10-6 | species | 1 | 0 |
| india | maharashtra | methylococcaceae bacterium sn10-6 | species | 1 | 0 |
| italy | liguria region | methylococcaceae bacterium uba659 | species | 1 | 0 |
| italy | liguria region | methylococcaceae bacterium uba662 | species | 1 | 0 |
| japan | aichi prefecture | type i methanotrophic bacterium | species | 8 | 0 |
| japan | okinawa prefecture | methylomarinum vadi | species | 6 | 0 |
| japan | shiga prefecture | methylococcaceae bacterium | species | 132 | 0 |
| netherlands | | methylococcaceae bacterium | species | 4 | 0 |
| romania | constanta county | methylococcaceae bacterium | species | 3 | 0 |
| russia | irkutsk oblast | methylococcaceae bacterium | species | 1 | 0 |
| united states | california | methylococcaceae bacterium uba2778 | species | 1 | 0 |
| united states | california | methylococcaceae bacterium uba2780 | species | 1 | 0 |
| united states | ohio | methylococcaceae bacterium nsm2-1 | species | 280 | 0 |
| united states | ohio | methylococcaceae bacterium nso1 | species | 379 | 0 |
| united states | ohio | methylococcaceae bacterium nsp1-1 | species | 328 | 0 |
| united states | ohio | methylococcaceae bacterium nsp1-2 | species | 422 | 0 |
| united states | tennessee | methylococcaceae bacterium | species | 354 | 0 |