| Congress | Years | Democrats | Republicans | Other | Democrats | Republicans | Other |
| 86th | 1959-1961 | 64 | 34 | 0 | 283 | 153 | |
| 87th | 1961-1963 | 64 | 36 | 0 | 262 | 175 | |
| 88th | 1963-1965 | 67 | 33 | 0 | 258 | 176 | 1 |
| 89th | 1965-1967 | 68 | 32 | 0 | 295 | 140 | |
| 90th | 1967-1969 | 64 | 36 | 0 | 248 | 187 | |
| 91st | 1969-1971 | 58 | 42 | 0 | 243 | 192 | |
| 92d | 1971-1973 | 54 | 44 | 2 | 255 | 180 | |
| 93d | 1973-1975 | 56 | 42 | 2 | 242 | 192 | 1 |
| 94th | 1975-1977 | 60 | 37 | 2 | 291 | 144 | 1 |
| 95th | 1977-1979 | 61 | 38 | 1 | 292 | 143 | |
| 96th | 1979-1981 | 58 | 41 | 1 | 277 | 158 | |
| 97th | 1981-1983 | 46 | 53 | 1 | 242 | 192 | 1 |
| 98th | 1983-1985 | 46 | 54 | 0 | 269 | 166 | |
| 99th | 1985-1987 | 47 | 53 | 0 | 253 | 182 | |
| 100th | 1987-1989 | 55 | 45 | 0 | 258 | 177 | |
| 101st | 1989-1991 | 55 | 45 | 0 | 260 | 175 | |
| 102d | 1991-1993 | 56 | 44 | 0 | 267 | 167 | 1 |
| 103d | 1993-1995 | 57 | 43 | 0 | 258 | 176 | 1 |
| 104th | 1995-1997 | 48 | 52 | 0 | 204 | 230 | 1 |
| 105th | 1997-1999 | 45 | 55 | 0 | 207 | 226 | 2 |
| 106th | 1999-2001 | 45 | 55 | 0 | 211 | 223 | 1 |
| 107th | 2001-2003 | 50 | 50 | 0 | 212 | 221 | 2 |
| 108th | 2003-2005 | 48 | 51 | 1 | 204 | 229 | 1 |
| 109th | 2005-2006 | 44 | 55 | 1 | 202 | 231 | 1 |