History and Government > U.S. Government

Composition of Congress, by Political Party, 1855–2017

Here is a breakdown of the composition of Congress by political party from 1855 to the present.

		Senate					House
Congress	Years	Total	Dems	Reps	Others	Vacant	Total	Dems	Reps	Others	Vacant
34th	1855–1857	62	42	15	5	—	234	83	108	43	—
35th	1857–1859	64	39	20	5	—	237	131	92	14	—
36th	1859–1861	66	38	26	2	—	237	101	113	23	—
37th	1861–1863	50	11	31	7	1	178	42	106	28	2
38th	1863–1865	51	12	39	—	—	183	80	103	—	—
39th	1865–1867	52	10	42	—	—	191	46	145	—	—
40th	1867–1869	53	11	42	—	—	193	49	143	—	1
41st	1869–1871	74	11	61	—	2	243	73	170	—	—
42nd	1871–1873	74	17	57	—	—	243	104	139	—	—
43rd	1873–1875	74	19	54	—	1	293	88	203	—	2
44th	1875–1877	76	29	46	—	1	293	181	107	3	2
45th	1877–1879	76	36	39	1	—	293	156	137	—	—
46th	1879–1881	76	43	33	—	—	293	150	128	14	1
47th	1881–1883	76	37	37	2	—	293	130	152	11	—
48th	1883–1885	76	36	40	—	—	325	200	119	6	—
49th	1885–1887	76	34	41	—	1	325	182	140	2	1
50th	1887–1889	76	37	39	—	—	325	170	151	4	—
51st	1889–1891	84	37	47	—	—	330	156	173	1	—
52nd	1891–1893	88	39	47	2	—	333	231	88	14	—
53rd	1893–1895	88	44	38	3	3	356	220	126	10	—
54th	1895–1897	88	39	44	5	—	357	104	246	7	—
55th	1897–1899	90	34	46	10	—	357	134	206	16	1
56th	1899–1901	90	26	53	11	—	357	163	185	9	—
57th	1901–1903	90	29	56	3	2	357	153	198	5	1
58th	1903–1905	90	32	58	—	—	386	178	207	—	1
59th	1905–1907	90	32	58	—	—	386	136	250	—	—
60th	1907–1909	92	29	61	—	2	386	164	222	—	—
61st	1909–1911	92	32	59	—	1	391	172	219	—	—
62nd	1911–1913	92	42	49	—	1	391	228	162	1	—
63rd	1913–1915	96	51	44	1	—	435	290	127	18	—
64th	1915–1917	96	56	39	1	—	435	231	193	8	3
65th	1917–1919	96	53	42	1	—	435	210¹	216	9	—
66th	1919–1921	96	47	48	1	—	435	191	237	7	—
67th	1921–1923	96	37	59	—	—	435	132	300	1	2
68th	1923–1925	96	43	51	2	—	435	207	225	3	—
69th	1925–1927	96	40	54	1	1	435	183	247	5	—
70th	1927–1929	96	47	48	1	—	435	195	237	3	—
71st	1929–1931	96	39	56	1	—	435	163	267	1	4
72nd	1931–1933	96	47	48	1	—	435	216²	218	1	—
73rd	1933–1935	96	59	36	1	—	435	313	117	5	—
74th	1935–1937	96	69	25	2	—	435	322	103	10	—
75th	1937–1939	96	75	17	4	—	435	333	89	13	—
76th	1939–1941	96	69	23	4	—	435	262	169	4	—
77th	1941–1943	96	66	28	2	—	435	267	162	6	—
78th	1943–1945	96	57	38	1	—	435	222	209	4	—
79th	1945–1947	96	57	38	1	—	435	243	190	2	—
80th	1947–1949	96	45	51	—	—	435	188	246	1	—
81st	1949–1951	96	54	42	—	—	435	263	171	1	—
82nd	1951–1953	96	48	47	1	—	435	234	199	2	—
83rd	1953–1955	96	46	48	2	—	435	213	221	1	—
84th	1955–1957	96	48	47	1	—	435	232	203	—	—
85th	1957–1959	96	49	47	—	—	435	234	201	—	—
86th	1959–1961	98	64	34	—	—	436³	283	153	—	—
87th	1961–1963	100	64	36	—	—	437⁴	262	175	—	—
88th	1963–1965	100	67	33	—	—	435	258	176	—	1
89th	1965–1967	100	68	32	—	—	435	295	140	—	—
90th	1967–1969	100	64	36	—	—	435	248	187	—	—
91st	1969–1971	100	58	42	—	—	435	243	192	—	—
92nd	1971–1973	100	54	44	2	—	435	255	180	—	—
93rd	1973–1975	100	56	42	2	—	435	242	192	1	—
94th	1975–1977	100	61	37	2	—	435	291	144	—	—
95th	1977–1979	100	61	38	1	—	435	292	143	—	—
96th	1979–1981	100	58	41	1	—	435	277	158	—	—
97th	1981–1983	100	46	53	1	—	435	242	192	1	—
98th	1983–1985	100	46	54	—	—	435	269	166	—	—
99th	1985–1987	100	47	53	—	—	435	253	182	—	—
100th	1987–1989	100	55	45	—	—	435	258	177	—	—
101st	1989–1991	100	55	45	—	—	435	260	175	—	—
102nd	1991–1993	100	56	44	—	—	435	267	167	1	—
103rd	1993–1995	100	57	43	—	—	435	258	176	1	—
104th	1995–1997	100	48	52	—	—	435	204	230	1	—
105th	1997–1999	100	45	55	—	—	435	207	226	2	—
106th	1999–2001	100	45	55	—	—	435	211	223	1	—
107th	2001–2003	100	50	50	—	—	435	212	221	2	—
108th	2003–2005	100	48	51	1	—	435	205	229	1	—
109th	2005–2007	100	44	55	1	—	435	202	231	1	1
110th	2007–2009	100	49	49	2	—	435	233	198	—	4
111th	2009–2011	100	57	41	2	2	435	256	178	—	1
112th	2011–2013	100	51	47	2	—	435	193	242	—	—
113th	2013–2015	100	54	45	1	—	435	201	234	—	—
114th	2015–2017	100	44	54	2	—	435	188	246	—	1