U.S. Senate - composition by political party affiliation 1983-2017

This graph shows the composition of the U.S. Senate by political party affiliation since 1983. The 115th Congress consists of 46 Democratic and 52 Republican senators.
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Composition of the U.S. Senate by political party affiliation from 1983 to 2017
DemocratRepublicanOther parties
115th Congress, 20174652-
114th Congress, 201544541
113th Congress, 201353452
112th Congress, 201151472
111th Congress, 200955412
110th Congress, 200749492
109th Congress, 200544551
108th Congress, 200348511
107th Congress, 20015050-
106th Congress, 19994555-
105th Congress, 19974555-
104th Congress, 19954555-
103d Congress, 19935743-
102d Congress, 19915743-
101st Congress, 19895545-
100th Congress, 19875545-
99th Congress, 19854753-
98th Congress, 19834654-
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