U.S. Senate Party Make-up Every Year

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First published: Saturday September 2nd, 2023

Frequently, people identify as independent but caucus with a major party. If there Independent, regardless of who they caucus with, they are counted as Independent on this chart.

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Congress	Federalist	Democratic-Republican	Democrat	Whig	Other	Republican
1	18	8			0
2	16	13			0
3	16	14			0
4	21	11			0
5	22	10			0
6	22	10			0
7	15	17			0
8	9	25			0
9	7	27			0
10	6	28			0
11	7	27			0
12	6	30			0
13	8	28			0
14	12	26			0
15	12	30			0
16	9	37			0
17	4	44			0
18	17		31		0
19	22		26		0
20	21		27		0
21			25	23	0
22			24	22	2
23			20	26	2
24			26	24	2
25			35	17	0
26			30	22	0
27			22	29	1
28			23	29	0
29			34	22	2
30			38	21	1
31			35	25	2
32			36	23	3
33			38	22	2
34			39	21	1	1
35			41		5	20
36			38		2	26
37			15		4	31
38			10		9	33
39			11		4	39
40			9		2	57
41			12		0	62
42			17		1	56
43			19		8	47
44			28		2	46
45			35		1	40
46			33		1	42
47			37		2	37
48			36		2	38
49			34		0	42
50			37		0	39
51			37		0	51
52			39		2	47
53			44		4	40
54			40		6	44
55			34		12	44
56			26		11	53
57			32		2	56
58			33		0	57
59			32		0	58
60			31		0	61
61			32		0	60
62			44		0	52
63			51		1	44
64			56		0	40
65			54		0	42
66			47		0	49
67			37		0	59
68			42		1	53
69			41		1	54
70			46		2	48
71			39		1	56
72			47		1	48
73			59		1	36
74			69		2	25
75			76		4	16
76			69		4	23
77			66		2	28
78			57		1	38
79			57		1	38
80			45		0	51
81			54		0	42
82			49		0	47
83			47		1	48
84			48		0	48
85			49		0	47
86			65		0	35
87			64		0	36
88			66		0	34
89			68		0	32
90			64		0	36
91			57		0	43
92			54		2	44
93			56		2	42
94			61		2	37
95			61		1	38
96			58		1	41
97			46		1	53
98			45		0	55
99			47		0	53
100			55		0	45
101			55		0	45
102			56		0	44
103			57		0	43
104			52		0	48
105			45		0	55
106			45		0	55
107			50		0	50
108			48		1	51
109			44		1	55
110			49		2	49
111			57		2	41
112			51		2	47
113			53		2	45
114			44		2	54
115			47		2	51
116			45		2	53
117			48		2	50
118			48		3	49

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Congress	Federalist	Democratic-Republican	Democrat	Whig	Other	Republican
1	18	8			0
2	16	13			0
3	16	14			0
4	21	11			0
5	22	10			0
6	22	10			0
7	15	17			0
8	9	25			0
9	7	27			0
10	6	28			0
11	7	27			0
12	6	30			0
13	8	28			0
14	12	26			0
15	12	30			0
16	9	37			0
17	4	44			0
18	17		31		0
19	22		26		0
20	21		27		0
21			25	23	0
22			24	22	2
23			20	26	2
24			26	24	2
25			35	17	0
26			30	22	0
27			22	29	1
28			23	29	0
29			34	22	2
30			38	21	1
31			35	25	2
32			36	23	3
33			38	22	2
34			39	21	1	1
35			41		5	20
36			38		2	26
37			15		4	31
38			10		9	33
39			11		4	39
40			9		2	57
41			12		0	62
42			17		1	56
43			19		8	47
44			28		2	46
45			35		1	40
46			33		1	42
47			37		2	37
48			36		2	38
49			34		0	42
50			37		0	39
51			37		0	51
52			39		2	47
53			44		4	40
54			40		6	44
55			34		12	44
56			26		11	53
57			32		2	56
58			33		0	57
59			32		0	58
60			31		0	61
61			32		0	60
62			44		0	52
63			51		1	44
64			56		0	40
65			54		0	42
66			47		0	49
67			37		0	59
68			42		1	53
69			41		1	54
70			46		2	48
71			39		1	56
72			47		1	48
73			59		1	36
74			69		2	25
75			76		4	16
76			69		4	23
77			66		2	28
78			57		1	38
79			57		1	38
80			45		0	51
81			54		0	42
82			49		0	47
83			47		1	48
84			48		0	48
85			49		0	47
86			65		0	35
87			64		0	36
88			66		0	34
89			68		0	32
90			64		0	36
91			57		0	43
92			54		2	44
93			56		2	42
94			61		2	37
95			61		1	38
96			58		1	41
97			46		1	53
98			45		0	55
99			47		0	53
100			55		0	45
101			55		0	45
102			56		0	44
103			57		0	43
104			52		0	48
105			45		0	55
106			45		0	55
107			50		0	50
108			48		1	51
109			44		1	55
110			49		2	49
111			57		2	41
112			51		2	47
113			53		2	45
114			44		2	54
115			47		2	51
116			45		2	53
117			48		2	50
118			48		3	49

Congress	Federalist	Democratic-Republican	Democrat	Whig	Other	Republican
1	18	8			0
2	16	13			0
3	16	14			0
4	21	11			0
5	22	10			0
6	22	10			0
7	15	17			0
8	9	25			0
9	7	27			0
10	6	28			0
11	7	27			0
12	6	30			0
13	8	28			0
14	12	26			0
15	12	30			0
16	9	37			0
17	4	44			0
18	17		31		0
19	22		26		0
20	21		27		0
21			25	23	0
22			24	22	2
23			20	26	2
24			26	24	2
25			35	17	0
26			30	22	0
27			22	29	1
28			23	29	0
29			34	22	2
30			38	21	1
31			35	25	2
32			36	23	3
33			38	22	2
34			39	21	1	1
35			41		5	20
36			38		2	26
37			15		4	31
38			10		9	33
39			11		4	39
40			9		2	57
41			12		0	62
42			17		1	56
43			19		8	47
44			28		2	46
45			35		1	40
46			33		1	42
47			37		2	37
48			36		2	38
49			34		0	42
50			37		0	39
51			37		0	51
52			39		2	47
53			44		4	40
54			40		6	44
55			34		12	44
56			26		11	53
57			32		2	56
58			33		0	57
59			32		0	58
60			31		0	61
61			32		0	60
62			44		0	52
63			51		1	44
64			56		0	40
65			54		0	42
66			47		0	49
67			37		0	59
68			42		1	53
69			41		1	54
70			46		2	48
71			39		1	56
72			47		1	48
73			59		1	36
74			69		2	25
75			76		4	16
76			69		4	23
77			66		2	28
78			57		1	38
79			57		1	38
80			45		0	51
81			54		0	42
82			49		0	47
83			47		1	48
84			48		0	48
85			49		0	47
86			65		0	35
87			64		0	36
88			66		0	34
89			68		0	32
90			64		0	36
91			57		0	43
92			54		2	44
93			56		2	42
94			61		2	37
95			61		1	38
96			58		1	41
97			46		1	53
98			45		0	55
99			47		0	53
100			55		0	45
101			55		0	45
102			56		0	44
103			57		0	43
104			52		0	48
105			45		0	55
106			45		0	55
107			50		0	50
108			48		1	51
109			44		1	55
110			49		2	49
111			57		2	41
112			51		2	47
113			53		2	45
114			44		2	54
115			47		2	51
116			45		2	53
117			48		2	50
118			48		3	49

Congress	Federalist	Democratic-Republican	Democrat	Whig	Other	Republican
1	18	8			0
2	16	13			0
3	16	14			0
4	21	11			0
5	22	10			0
6	22	10			0
7	15	17			0
8	9	25			0
9	7	27			0
10	6	28			0
11	7	27			0
12	6	30			0
13	8	28			0
14	12	26			0
15	12	30			0
16	9	37			0
17	4	44			0
18	17		31		0
19	22		26		0
20	21		27		0
21			25	23	0
22			24	22	2
23			20	26	2
24			26	24	2
25			35	17	0
26			30	22	0
27			22	29	1
28			23	29	0
29			34	22	2
30			38	21	1
31			35	25	2
32			36	23	3
33			38	22	2
34			39	21	1	1
35			41		5	20
36			38		2	26
37			15		4	31
38			10		9	33
39			11		4	39
40			9		2	57
41			12		0	62
42			17		1	56
43			19		8	47
44			28		2	46
45			35		1	40
46			33		1	42
47			37		2	37
48			36		2	38
49			34		0	42
50			37		0	39
51			37		0	51
52			39		2	47
53			44		4	40
54			40		6	44
55			34		12	44
56			26		11	53
57			32		2	56
58			33		0	57
59			32		0	58
60			31		0	61
61			32		0	60
62			44		0	52
63			51		1	44
64			56		0	40
65			54		0	42
66			47		0	49
67			37		0	59
68			42		1	53
69			41		1	54
70			46		2	48
71			39		1	56
72			47		1	48
73			59		1	36
74			69		2	25
75			76		4	16
76			69		4	23
77			66		2	28
78			57		1	38
79			57		1	38
80			45		0	51
81			54		0	42
82			49		0	47
83			47		1	48
84			48		0	48
85			49		0	47
86			65		0	35
87			64		0	36
88			66		0	34
89			68		0	32
90			64		0	36
91			57		0	43
92			54		2	44
93			56		2	42
94			61		2	37
95			61		1	38
96			58		1	41
97			46		1	53
98			45		0	55
99			47		0	53
100			55		0	45
101			55		0	45
102			56		0	44
103			57		0	43
104			52		0	48
105			45		0	55
106			45		0	55
107			50		0	50
108			48		1	51
109			44		1	55
110			49		2	49
111			57		2	41
112			51		2	47
113			53		2	45
114			44		2	54
115			47		2	51
116			45		2	53
117			48		2	50
118			48		3	49