Composition of Congress by Political Party, 1855–2007

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  SenateHouse
CongressYearsTotalDemsRepsOthersVacantTotalDemsRepsOthersVacant
34th1855-185762 42 155023483108430
35th1857-18596439205023713192140
36th1859-186166382620237101113230
37th1861-18635011317117842106282
38th1863-1865511239001838010300
39th1865-1867521042001914614500
40th1867-1869531142001934914301
41st1869-1871741161022437317000
42nd1871-18737417570024310413900
43rd1873-1875741954012938820302
44th1875-18777629460129318110732
45th1877-18797636391029315613700
46th1879-188176433300293150128141
47th1881-188376373720293130152110
48th1883-18857636400032520011960
49th1885-18877634410132518214021
50th1887-18897637390032517015140
51st1889-18918437470033015617310
52nd1891-18938839472033323188140
53rd1893-189588443833356220126100
54th1895-18978839445035710424670
55th1897-1899903446100357134206161
56th1899-190190265311035716318590
57th1901-19039029563235715319851
58th1903-19059032580038617820701
59th1905-19079032580038613625000
60th1907-19099229610238616422200
61st1909-19119232590139117221900
62nd1911-19139242490139122816210
63rd1913-191596514410435290127180
64th1915-19179656391043523119383
65th1917-191996534210435210121690
66th1919-19219647481043519123770
67th1921-19239637590043513230012
68th1923-19259643512043520722530
69th1925-19279640541143518324750
70th1927-19299647481043519523730
71st1929-19319639561043516326714
72nd1931-193396474810435216221810
73rd1933-19359659361043531311750
74th1935-193796692520435322103100
75th1937-19399675174043533389130
76th1939-19419669234043526216940
77th1941-19439666282043526716260
78th1943-19459657381043522220940
79th1945-19479657381043524319020
80th1947-19499645510043518824610
81st1949-19519654420043526317110
82nd1951-19539648471043523419920
83rd1953-19559646482043521322110
84th1955-19579648471043523220300
85th1957-19599649470043523420100
86th1959-196198643400436328315300
87th1961-1963100643600437426217500
88th1963-196510067330043525817601
89th1965-196710068320043529514000
90th1967-196910064360043524818700
91st1969-197110058420043524319200
92nd1971-197310054442043525518000
93rd1973-197510056422043524219210
94th1975-197710061372043529114400
95th1977-197910061381043529214300
96th1979-198110058411043527715800
97th1981-198310046531043524219210
98th1983-198510046540043526916600
99th1985-198710047530043525318200
100th1987-198910055450043525817700
101st1989-199110055450043526017500
102nd1991-199310056440043526716710
103rd1993-199510057430043525817610
104th1995-199710048520043520423010
105th1997-199910045550043520722620
106th1999-200110045550043521122310
107th2001-200310050500043521222120
108th2003-200510048511043520522910
109th2005-200710044551043520223111

NOTE: All figures reflect immediate results of elections.
1. Democrats organized House with help of other parties.
2. Democrats organized House due to Republican deaths.
3. Proclamation declaring Alaska a state issued 3 January 1959.
4. Proclamation declaring Hawaii a state issued 21 August 1959.
Source: Office of the Clerk of the House of Representatives: http://clerkweb.house.gov/histrecs/history.htm

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