List of United States senators in the 115th Congress explained

This is a complete list of United States senators during the 115th United States Congress listed by seniority, from January 3, 2017, to January 3, 2019. It is a historical listing and will contain people who have not served the entire two-year Congress on account of resignations, deaths, or expulsions.

In this Congress, Bill Cassidy is the most junior senior senator. Jeff Sessions was the most senior junior senator at the start of this Congress, but resigned on February 8, 2017, to become United States Attorney General. Maria Cantwell has remained the most senior junior senator since.

Order of service is based on the commencement of the senator's first term. Behind this is former service as a senator (only giving the senator seniority within his or her new incoming class), service as vice president, a House member, a cabinet secretary, or a governor of a state. The final factor is the population of the senator's state.[1] [2] [3] [4] [5]

Terms of service

ClassTerms of service of senators that expired in years
Class 1Terms of service of senators that expired in 2019 (Arizona, California, Connecticut, Delaware, Florida, Hawaii, Indiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Jersey, New Mexico, New York, North Dakota, Ohio, Pennsylvania, Rhode Island, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, and Wyoming.)[6]
Class 2Terms of service of senators that expired in 2021 (Alabama, Alaska, Arkansas, Colorado, Delaware, Georgia, Iowa, Idaho, Illinois, Kansas, Kentucky, Louisiana, Massachusetts, Maine, Michigan, Minnesota, Mississippi, Montana, North Carolina, Nebraska, New Hampshire, New Jersey, New Mexico, Oklahoma, Oregon, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Virginia, West Virginia, and Wyoming.)[7]
Class 3Terms of service of senators that expired in 2023 (Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Idaho, Illinois, Iowa, Indiana, Kansas, Kentucky, Louisiana, Massachusetts, Maine, Michigan, Minnesota, Mississippi, North Carolina, North Dakota, New Hampshire, New Mexico, Nevada, New York, Oklahoma, Oregon, South Carolina, South Dakota, Tennessee, Utah, Washington and Wisconsin.)[8]

U.S. Senate seniority list

RankHistorical
rank		SenatorPartyStateSeniority dateOther factors
11692DemocraticVermontJanuary 3, 1975
21708RepublicanUtahJanuary 3, 1977
31719[9] RepublicanMississippiDecember 27, 1978Former member of the U.S. House of Representatives
41743RepublicanIowaJanuary 3, 1981
51766RepublicanKentuckyJanuary 3, 1985
61775RepublicanAlabamaJanuary 3, 1987Former member of the U.S. House of Representatives (8 years)
71777[10] RepublicanArizonaFormer member of the U.S. House of Representatives (4 years)
81801DemocraticCaliforniaNovember 10, 1992 
91812DemocraticWashingtonJanuary 3, 1993 
101816RepublicanOklahomaNovember 17, 1994
111827DemocraticOregonFebruary 6, 1996
121830RepublicanKansasJanuary 3, 1997Former member of the U.S. House of Representatives (16 years)
131831DemocraticIllinoisFormer member of the U.S. House of Representatives (14 years)
141835DemocraticRhode IslandFormer member of the U.S. House of Representatives (6 years)
151839[11] RepublicanAlabamaAlabama 22nd in population (1990)
161842RepublicanMaineMaine 38th in population (1990)
171843RepublicanWyomingWyoming 50th in population (1990)
181844DemocraticNew YorkJanuary 3, 1999Former member of the U.S. House of Representatives (18 years)
191846RepublicanIdahoFormer member of the U.S. House of Representatives (6 years)
201854DemocraticFloridaJanuary 3, 2001Former member of the U.S. House of Representatives (12 years)
211855DemocraticDelawareFormer member of the U.S. House of Representatives (10 years)
221856DemocraticMichiganFormer member of the U.S. House of Representatives (4 years)
231859DemocraticWashingtonFormer member of the U.S. House of Representatives (2 years)
241873RepublicanTexasDecember 1, 2002 
251867RepublicanAlaskaDecember 20, 2002 
261869RepublicanSouth CarolinaJanuary 3, 2003Former member of the U.S. House of Representatives
271871RepublicanTennessee 
281876RepublicanNorth CarolinaJanuary 3, 2005Former member of the U.S. House of Representatives (10 years)
291879RepublicanSouth DakotaFormer member of the U.S. House of Representatives (6 years)
301880RepublicanGeorgiaFormer member of the U.S. House of Representatives (5 years, 10 months)
311885DemocraticNew JerseyJanuary 18, 2006 
321886DemocraticMarylandJanuary 3, 2007Former member of the U.S. House of Representatives (20 years)
331887IndependentVermontFormer member of the U.S. House of Representatives (16 years)[12]
341888DemocraticOhioFormer member of the U.S. House of Representatives (14 years)
351889DemocraticPennsylvaniaPennsylvania 6th in population (2000)
361891RepublicanTennesseeTennessee 16th in population (2000)
371892DemocraticMissouriMissouri 17th in population (2000)
381893DemocraticMinnesotaMinnesota 21st in population (2000)
391894DemocraticRhode IslandRhode Island 43rd in population (2000)
401895DemocraticMontanaMontana 44th in population (2000)
411896RepublicanWyomingJune 25, 2007 
421897RepublicanMississippiDecember 31, 2007
431899DemocraticNew MexicoJanuary 3, 2009Former member of the U.S. House of Representatives
441901DemocraticNew HampshireFormer governor (6 years)
451902DemocraticVirginiaFormer governor (4 years)
461903RepublicanIdahoFormer governor (7 months)
471905DemocraticOregon 
481909DemocraticColoradoJanuary 21, 2009
491910DemocraticNew YorkJanuary 26, 2009
501911[13] DemocraticMinnesotaJuly 7, 2009
511916DemocraticWest VirginiaNovember 15, 2010Former governor
521917DemocraticDelaware 
531919RepublicanMissouriJanuary 3, 2011Former member of the U.S. House of Representatives (14 years); Missouri 17th in population (2000)
541920RepublicanKansasFormer member of the U.S. House of Representatives (14 years); Kansas 32nd in population (2000)
551921RepublicanOhioFormer member of the U.S. House of Representatives (12 years)
561922RepublicanArkansasFormer member of the U.S. House of Representatives (9 years)
571923RepublicanPennsylvaniaFormer member of the U.S. House of Representatives (6 years)
581924RepublicanNorth DakotaFormer governor
591925RepublicanFloridaFlorida 4th in population (2000)
601926RepublicanWisconsinWisconsin 18th in population (2000)
611927RepublicanKentuckyKentucky 25th in population (2000)
621928DemocraticConnecticutConnecticut 29th in population (2000)
631929RepublicanUtahUtah 34th in population (2000)
641931RepublicanNevadaMay 9, 2011 
651932DemocraticHawaiiDecember 27, 2012
661933RepublicanSouth CarolinaJanuary 2, 2013
671934DemocraticWisconsinJanuary 3, 2013Former member of the U.S. House of Representatives (14 years)
681935RepublicanArizonaFormer member of the U.S. House of Representatives (12 years)
691936DemocraticIndianaFormer member of the U.S. House of Representatives (6 years); Indiana 16th in population (2010)
701937DemocraticConnecticutFormer member of the U.S. House of Representatives (6 years); Connecticut 29th in population (2010)
711938DemocraticHawaiiFormer member of the U.S. House of Representatives (6 years); Hawaii 42nd in population (2010)
721939DemocraticNew MexicoFormer member of the U.S. House of Representatives (4 years)
731940IndependentMaineFormer governor (8 years)
741941DemocraticVirginiaFormer governor (4 years)
751942RepublicanTexasTexas 2nd in population (2010)
761943DemocraticMassachusettsMassachusetts 15th in population (2010)
771944RepublicanNebraskaNebraska 38th in population (2010)
781945DemocraticNorth DakotaNorth Dakota 48th in population (2010)
791948DemocraticMassachusettsJuly 16, 2013Former member of the U.S. House of Representatives
801949DemocraticNew JerseyOctober 31, 2013 
811951RepublicanWest VirginiaJanuary 3, 2015Former member of the U.S. House of Representatives (14 years)
821952DemocraticMichiganFormer member of the U.S. House of Representatives (6 years); Michigan 9th in population (2010)
831953RepublicanLouisianaFormer member of the U.S. House of Representatives (6 years); Louisiana 25th in population (2010)
841954RepublicanColoradoFormer member of the U.S. House of Representatives (4 years); Colorado 22nd in population (2010)
851955RepublicanOklahomaFormer member of the U.S. House of Representatives (4 years); Oklahoma 28th in population (2010)
861956RepublicanArkansasFormer member of the U.S. House of Representatives (2 years); Arkansas 32nd in population (2010)
871957RepublicanMontanaFormer member of the U.S. House of Representatives (2 years); Montana 44th in population (2010)
881958RepublicanSouth DakotaFormer governor
891959RepublicanGeorgiaGeorgia 8th in population (2010)
901960RepublicanNorth CarolinaNorth Carolina 10th in population (2010)
911961RepublicanIowaIowa 30th in population (2010)
921962RepublicanNebraskaNebraska 37th in population (2010)
931963RepublicanAlaskaAlaska 47th in population (2010)
941964DemocraticMarylandJanuary 3, 2017Former member of the U.S. House of Representatives (14 years)
951965RepublicanIndianaFormer member of the U.S. House of Representatives (6 years)
961966DemocraticIllinoisFormer member of the U.S. House of Representatives (4 years)
971967DemocraticNew HampshireFormer governor
981968DemocraticCaliforniaCalifornia 1st in population (2010)
991969RepublicanLouisianaLouisiana 25th in population (2010)
1001970DemocraticNevadaNevada 35th in population (2010)
1011971RepublicanAlabamaFebruary 9, 2017 
1021972DemocraticMinnesotaJanuary 3, 2018Minnesota 21st in population (2010)
1031973DemocraticAlabamaAlabama 23rd in population (2010)
1041974data-sort-value="Hyde-Smith Cindy" Cindy Hyde-SmithRepublicanMississippiApril 2, 2018
1051820[14] data-sort-value="Kyl Jon" Jon Kyl[15] RepublicanArizonaSeptember 4, 2018

See also

External links

Notes and References

  1. https://www.senate.gov/artandhistory/history/common/briefing/senators_chronological.htm A Chronological List of United States Senators 1789-Present
  2. http://www2.census.gov/prod2/statcomp/documents/1971-02.pdf 1971 U.S Census Report
  3. http://www2.census.gov/prod2/statcomp/documents/1981-02.pdf 1981 U.S Census Report
  4. http://www2.census.gov/prod2/statcomp/documents/1991-01.pdf 1991 U.S Census Report
  5. Web site: 2000 Census State Population Rankings . 2016-10-31 . https://archive.today/20200212040040/http://factfinder.census.gov/servlet/GCTTable?_bm=n&_lang=en&mt_name=DEC_2000_SF1_U_GCTPH1R_US9S&format=US-9S&_box_head_nbr=GCT-PH1-R&ds_name=DEC_2000_SF1_U&geo_id=01000US . 2020-02-12 . dead .
  6. Terms of service of senators that expired in 2019.
  7. Terms of service of senators that expired in 2021.
  8. Terms of service of senators that expired in 2023.
  9. In Mississippi, Thad Cochran (R) resigned April 1, 2018. He was replaced April 2, 2018 by Cindy Hyde-Smith (R).
  10. In Arizona, John McCain (R) died August 25, 2018. He was replaced September 4, 2018 by Jon Kyl (R).
  11. In Alabama, Jeff Sessions (R) resigned February 8, 2017. He was replaced February 9, 2017 by Luther Strange (R). Strange lost the election to finish Sessions's term and was replaced January 3, 2018 by Doug Jones (D).
  12. Although Sanders was a candidate for the 2016 Democratic presidential nomination, and votes with the Democrats for organizational purposes, he has been elected and classified as an Independent throughout his time in Congress.
  13. In Minnesota, Al Franken (D) resigned January 2, 2018. He was replaced January 3, 2018 by Tina Smith (D).
  14. Kyl previously served as a U.S. senator.
  15. In Arizona, Jon Kyl (R) resigned December 31, 2018.

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