United States House of Representatives elections, 1838 Pennsylvania Pennsylvania

| District | Incumbent | Party | First_elected | Result_ | Candidates |
|---|---|---|---|---|---|
| Pennsylvania 12 | Daniel Sheffer | Democratic | 1836 | Lost re-election Whig gain | James Cooper (W) 55.9% Daniel Sheffer (D) 44.1% |
| Pennsylvania 15 | David Petrikin | Democratic | 1836 | Re-elected | David Petrikin (D) 53.5% David Hurley (W) 46.5% |
| Pennsylvania 18 | Charles Ogle | Anti-Masonic | 1836 | Re-elected | Charles Ogle (AM) 55.9% Job Mann (D) 44.1% |
| Pennsylvania 20 | Andrew Buchanan | Democratic | 1832 | Retired Democratic hold | Enos Hook (D) 62.4% Fideleo Hughes (W) 37.6% |
| Pennsylvania 21 | Thomas M. T. McKennan | Anti-Masonic | 1830 | Retired Democratic gain | Isaac Leet (D) 50.1% Joseph Lawrence (W) 49.9% |
| Pennsylvania 22 | Richard Biddle | Anti-Masonic | 1836 | Re-elected | Richard Biddle (AM) 58.1% James Power (D) 41.9% |
| Pennsylvania 23 | William Beatty | Democratic | 1836 | Re-elected | William Beatty (D) 61.5% George W. Smith (W) 38.5% |
| Pennsylvania 24 | Thomas Henry | Anti-Masonic | 1836 | Re-elected | Thomas Henry (AM) 54.7% James D. White (D) 45.3% |