US Senate Average Age by Congress (1789-2025)

Mean and median age of US Senators for each Congress from the 1st (1789) to the 119th (2025), showing a long-term aging trend.
# congress
mean_age
median_age
n
year
1 1 46.67857142857143 46.5 28 1789
2 2 45.3 44.5 30 1791
3 3 44.0625 40.5 32 1793
4 4 44.333333333333336 43.0 42 1795
5 5 45.09090909090909 44.5 44 1797
6 6 44.973684210526315 43.5 38 1799
7 7 44.97222222222222 44.5 36 1801
8 8 46.54545454545455 46.0 44 1803
9 9 47.945945945945944 48.0 37 1805
10 10 48.82051282051282 47.0 39 1807
11 11 47.36363636363637 48.0 44 1809
12 12 47.7027027027027 46.0 37 1811
13 13 46.15555555555556 45.0 45 1813
14 14 44.46511627906977 45.0 43 1815
15 15 44.955555555555556 45.0 45 1817
16 16 45.86274509803921 46.0 51 1819
17 17 47.62264150943396 48.0 53 1821
18 18 48.094339622641506 47.0 53 1823
19 19 48.36666666666667 47.5 60 1825
20 20 48.264150943396224 47.0 53 1827
21 21 47.833333333333336 47.0 54 1829
22 22 48.0 48.0 55 1831
23 23 48.160714285714285 48.0 56 1833
24 24 47.714285714285715 48.0 63 1835
25 25 48.05084745762712 49.0 59 1837
26 26 49.13333333333333 50.0 60 1839
27 27 49.16949152542373 47.0 59 1841
28 28 48.916666666666664 48.0 60 1843
29 29 50.10606060606061 49.0 66 1845
30 30 49.625 49.5 72 1847
31 31 50.40845070422535 49.0 71 1849
32 32 49.95890410958904 49.0 73 1851
33 33 50.1 48.5 70 1853
34 34 50.734375 49.0 64 1855
35 35 50.77777777777778 49.0 72 1857
36 36 49.94285714285714 49.0 70 1859
37 37 49.82432432432432 49.0 74 1861
38 38 50.6 49.0 55 1863
39 39 50.54237288135593 50.0 59 1865
40 40 49.289855072463766 48.0 69 1867
41 41 50.175 49.0 80 1869
42 42 51.48 51.0 75 1871
43 43 51.075949367088604 50.0 79 1873
44 44 52.146341463414636 51.0 82 1875
45 45 52.74390243902439 52.0 82 1877
46 46 54.123456790123456 53.0 81 1879
47 47 53.71764705882353 53.0 85 1881
48 48 54.43589743589744 54.0 78 1883
49 49 55.79761904761905 56.0 84 1885
50 50 57.142857142857146 57.0 77 1887
51 51 57.714285714285715 57.0 91 1889
52 52 57.166666666666664 57.0 96 1891
53 53 56.802083333333336 57.0 96 1893
54 54 56.27777777777778 56.5 90 1895
55 55 56.177083333333336 56.0 96 1897
56 56 56.22105263157895 56.0 95 1899
57 57 57.54255319148936 58.0 94 1901
58 58 58.86021505376344 59.0 93 1903
59 59 58.357142857142854 58.0 98 1905
60 60 58.205882352941174 57.0 102 1907
61 61 57.56310679611651 57.0 103 1909
62 62 56.31818181818182 56.0 110 1911
63 63 57.17821782178218 56.0 101 1913
64 64 57.23 57.0 100 1915
65 65 56.171171171171174 56.0 111 1917
66 66 56.98019801980198 57.0 101 1919
67 67 57.51401869158879 58.0 107 1921
68 68 57.55769230769231 59.0 104 1923
69 69 57.285714285714285 57.0 105 1925
70 70 57.42718446601942 58.0 103 1927
71 71 58.36697247706422 58.0 109 1929
72 72 57.68867924528302 57.0 106 1931
73 73 58.14563106796116 58.0 103 1933
74 74 57.301886792452834 58.0 106 1935
75 75 57.794392523364486 59.0 107 1937
76 76 57.61538461538461 60.0 104 1939
77 77 58.00917431192661 58.0 109 1941
78 78 58.17307692307692 59.0 104 1943
79 79 58.81651376146789 58.0 109 1945
80 80 57.183673469387756 56.5 98 1947
81 81 57.30275229357798 57.0 109 1949
82 82 57.42424242424242 56.0 99 1951
83 83 57.78378378378378 57.0 111 1953
84 84 57.93939393939394 59.0 99 1955
85 85 58.396039603960396 59.0 101 1957
86 86 58.42718446601942 58.0 103 1959
87 87 58.10476190476191 59.0 105 1961
88 88 57.55882352941177 58.5 102 1963
89 89 58.49514563106796 59.0 103 1965
90 90 58.495049504950494 60.0 101 1967
91 91 57.35294117647059 57.0 102 1969
92 92 57.22330097087379 57.0 103 1971
93 93 56.48039215686274 56.0 102 1973
94 94 56.445544554455445 56.0 101 1975
95 95 55.43269230769231 55.0 104 1977
96 96 53.554455445544555 53.0 101 1979
97 97 53.2970297029703 52.0 101 1981
98 98 54.475247524752476 53.0 101 1983
99 99 55.20792079207921 54.0 101 1985
100 100 55.45544554455446 54.0 101 1987
101 101 56.27450980392157 55.0 102 1989
102 102 58.0 57.0 102 1991
103 103 58.48039215686274 58.0 102 1993
104 104 58.90291262135922 58.0 103 1995
105 105 58.46 57.0 100 1997
106 106 59.205882352941174 58.0 102 1999
107 107 59.794117647058826 59.0 102 2001
108 108 60.42 60.0 100 2003
109 109 61.24752475247525 61.0 101 2005
110 110 62.627450980392155 63.0 102 2007
111 111 62.75675675675676 62.0 111 2009
112 112 62.40196078431372 61.5 102 2011
113 113 61.63809523809524 62.0 105 2013
114 114 61.71 62.0 100 2015
115 115 62.857142857142854 63.0 105 2017
116 116 63.26470588235294 64.0 102 2019
117 117 64.03921568627452 65.0 102 2021
118 118 64.03809523809524 65.0 105 2023
119 119 64.17647058823529 65.0 102 2025
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