Missouri was admitted to the union on August 10, 1821,[1] but elections had been held August 28, 1820.
| District | Incumbent | This race | |||
|---|---|---|---|---|---|
| Member | Party | First elected | Results | Candidates | |
| Missouri at-large | None (District created) | New seat. New member elected. Democratic-Republican gain. | √ John Scott (Democratic-Republican) 93.6% James Caldwell 6.4% | ||