| District | Incumbent | Party | First elected | Result | Candidates | ||||
|---|---|---|---|---|---|---|---|---|---|
| John Campbell | Federalist | 1801 | Incumbent re-elected. | nowrap | √ John Campbell (Federalist) 99.6% | ||||
| Walter Bowie | Democratic-Republican | 1802 (special) | Incumbent retired. New member elected. Democratic-Republican hold. | nowrap | √ Leonard Covington (Democratic-Republican) 52.0% Archibald Van Horne (Democratic-Republican) 46.8% Clement Hill (Federalist) 1.1% | ||||
| Thomas Plater | Federalist | 1801 | Incumbent lost re-election. New member elected. Democratic-Republican gain. | nowrap | √ Patrick Magruder (Democratic-Republican) 56.0% Thomas Plater (Federalist) 44.0% | ||||
| Daniel Hiester | Democratic-Republican | 1788 (Pennsylvania) 1796 (Resigned) 1801 (Maryland) | Incumbent died March 7, 1804. New member elected. Democratic-Republican hold. Successor was also elected on the same day to finish the current term, see above. | nowrap | √ Roger Nelson (Democratic-Republican) 98.5% Eli Williams (Federalist) 0.8% Scattering 0.7%[1] | ||||
| Nicholas R. Moore | Democratic-Republican | 1803 | Incumbent re-elected. | √ Nicholas R. Moore (Democratic-Republican) 50.9% √ William McCreery (Democratic-Republican) 46.3% Robert Goodloe Harper (Federalist) 1.8% Others 1.0% | |||||
| William McCreery | Democratic-Republican | 1803 | Incumbent re-elected. | ||||||
| John Archer | Democratic-Republican | 1801 | Incumbent re-elected. | nowrap | √ John Archer (Democratic-Republican) Unopposed | ||||
| Joseph H. Nicholson | Democratic-Republican | 1798 (Special) | Incumbent re-elected. | nowrap | √ Joseph H. Nicholson (Democratic-Republican) 99.6% | ||||
| John Dennis | Federalist | 1796 | Incumbent retired. New member elected. Federalist hold. | nowrap | √ Charles Goldsborough (Federalist) 56.6% Henry Waggaman (Democratic-Republican) 43.4% |