Walter Flowers | | Democratic | 1968 | Incumbent re-elected. | nowrap | |- ! | John Hall Buchanan Jr. | | Republican | 1964 | Incumbent re-elected. | nowrap | |- ! | Tom Bevill | | Democratic | 1966 | Incumbent re-elected. | nowrap | |- ! | Robert E. Jones Jr. | | Democratic | 1947 | Incumbent re-elected. | nowrap | |} Alaska |- ! | Howard Wallace Pollock | | Republican | 1966 | | Incumbent retired to run for Governor of Alaska.New member elected.Democratic gain. | nowrap | |} Arizona |- ! | 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 | |} 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 | Incumbent re-elected. | nowrap | |} California One Democratic seat was lost to Republicans. Democrats, therefore, retained a 20-18 margin over Republicans. |- ! | 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. | nowrap | |- ! | William S. Mailliard | | Republican | 1952 | Incumbent re-elected. | nowrap | |- ! | Jeffery Cohelan | | Democratic | 1958 | | Incumbent lost renomination.New member elected.Democratic hold. | nowrap | |- ! | George P. Miller | | Democratic | 1944 | Incumbent re-elected. | nowrap | |- ! | Don Edwards | | Democratic | 1962 | Incumbent re-elected. | nowrap | |- ! | Charles S. Gubser | | Republican | 1952 | Incumbent re-elected.