MO is the acronym for the state of Missouri, and it is formed by combining the first and fifth letters of the state’s official name. This could appear to be a simple task, but it actually isn’t since the natural assumption is that the abbreviation for the state of Missouri is MI, which is the state’s initial two letters.
A List of the Abbreviations Used for US States
| State Name | USPS Abbreviation | Traditional Abbreviation |
|---|---|---|
| Missouri | MO | Mo. |
| Montana | MT | Mont. |
| Nebraska | NE | Neb. or Nebr. |
| Nevada | NV | Nev. |