| Republican | 1964 | Incumbent re-elected. | nowrap | |- ! | Walter Flowers | | Democratic | 1968 | Incumbent re-elected. | nowrap | |} Alaska Incumbent Nick Begich won re-election three weeks after having disappeared in a plane crash October 16; challenger Don Young would later win a March special election after Begich was declared dead on December 29. |- ! | Nick Begich | | Democratic | 1970 | Incumbent re-elected posthumously. | nowrap | |} Arizona Arizona was reapportioned from 3 seats to 4 and carved a new district in the Phoenix suburbs and the northeast from parts of the existing districts. |- ! | John Jacob Rhodes | | Republican | 1952 | Incumbent re-elected. | nowrap | |- ! | Mo Udall | | Democratic | 1961 | Incumbent re-elected. | nowrap | |- ! | Sam Steiger | | Republican | 1966 | Incumbent re-elected. | nowrap | |- ! | colspan=3 | None (district created) | | New seat.New member elected.Republican gain. | nowrap | |} Arkansas |- ! | William Vollie Alexander Jr. | | Democratic | 1968 | Incumbent re-elected. | nowrap | |- ! | Wilbur Mills | | Democratic | 1938 | Incumbent re-elected. | nowrap | |- ! | John Paul Hammerschmidt | | Republican | 1966 | Incumbent re-elected. | nowrap | |- ! | David Pryor | | Democratic | 1966 | | Retired to run for U.S. Senator.New member elected.Democratic hold. | nowrap | |} California California was reapportioned from 38 to 43 seats, adding one seat in the Bay Area, one in the Central Valley, and 3 in southern California; three went to Democrats, two to Republicans. Despite a retirement and two lost renominations, both parties held their seats in this election, bringing the Democrats up from 20 seats to 23 and the Republicans up from 18 seats to 20. |- ! | Donald H. Clausen | | Republican | 1963 | Incumbent re-elected. | nowrap | |- ! | Harold T. Johnson | | Democratic | 1958 | Incumbent re-elected. | nowrap | |- ! | John E. Moss | | Democratic | 1952 | Incumbent re-elected. | nowrap | |- ! | Robert L. Leggett | | Democratic | 1962 | Incumbent re-elected. | nowrap | |- ! | Phillip Burton | | Democratic | 1964 | Incumbent re-elected. |