- Henry F. Ashurst , Democrat, Arizona
- John H. Bankhead , Democrat, Alabama
- John C. Beckham , Democrat, Kentucky
- William E. Borah , Republican, Idaho
- James H. Brady , Republican, Idaho
- Frank B. Brandegee , Republican, Connecticut
- Robert F. Broussard , Democrat, Louisiana
- Nathan P. Bryan , Democrat, Florida
- Edwin C. Burleigh , Republican, Maine. Burleigh died 16 June 1916; his vacant seat was filled by Bert M. Fernald.
- Thomas B. Catron , Republican, New Mexico
- George E. Chamberlain , Democrat, Oregon
- William E. Chilton , Democrat, West Virginia
- Moses E. Clapp , Republican, Minnesota
- Clarence D. Clark , Republican, Wyoming
- James P. Clarke , Democrat, Arkansas. Clarke died 1 October 1916 ; the vacancy was filled by William F. Kirby.
- Lebaron B. Colt , Republican, Rhode Island
- Charles A. Culberson , Democrat, Texas
- Albert B. Cummins , Republican, Iowa
- Charles Curtis , Republican, Kansas
- William P. Dillingham , Republican, Vermont
- Henry A. Du Pont , Republican, Delaware
- Albert B. Fall , Republican, New Mexico
- Bert M. Fernald , Republican, Maine. Fernald was elected to take Edwin C. Burleigh's seat after Burleigh's death.
- Duncan U. Fletcher , Democrat, Florida
- Jacob H. Gallinger , Republican, New Hampshire
- Nathan Goff , Republican, West Virginia
- Thomas P. Gore , Democrat, Oklahoma
- Asle J. Gronna , Republican, North Dakota
- Warren G. Harding , Republican, Ohio
- Thomas W. Hardwick , Democrat, Georgia
- Gilbert M. Hitchcock , Democrat, Nebraska
- Henry F. Hollis , Democrat, New Hampshire
- William Hughes , Democrat, New Jersey
- Paul O. Husting , Democrat, Wisconsin
- Ollie M. James , Democrat, Kentucky
- Charles Fletcher Johnson , Democrat, Maine
- Edwin S. Johnson , Democrat, South Dakota
- Wesley L. Jones , Republican, Washington
- William S. Kenyon , Republican, Iowa
- John W. Kern , Democrat, Indiana
- William F. Kirby , Democrat, Arkansas. Kirby was elected to take James P. Clarke's seat after Clarke's death.
- Robert M. La Follette , Republican, Wisconsin
- Harry Lane , Democrat, Oregon
- Luke Lea , Democrat, Tennessee
- Blair Lee , Democrat, Maryland
- James H. Lewis , Democrat, Illinois
- Henry F. Lippitt , Republican, Rhode Island
- Henry C. Lodge , Republican, Massachusetts
- Thomas S. Martin , Democrat, Virginia
- James E. Martine , Democrat, New Jersey
- Porter J. McCumber , Republican, North Dakota
- George P. McLean , Republican, Connecticut
- Henry L. Myers , Democrat, Montana
- Knute Nelson , Republican, Minnesota
- Francis G. Newlands , Democrat, Nevada
- George W. Norris , Republican, Nebraska
- James A. O'gorman , Democrat, New York
- George T. Oliver , Republican, Pennsylvania
- Lee S. Overman , Democrat, North Carolina
- Robert L. Owen , Democrat, Oklahoma
- Carroll S. Page , Republican, Vermont
- Boies Penrose , Republican, Pennsylvania
- James D. Phelan , Democrat, California
- Key Pittman , Democrat, Nevada
- Miles Poindexter , Republican, Washington
- Atlee Pomerene , Democrat, Ohio
- Joseph E. Ransdell , Democrat, Louisiana
- James A. Reed , Democrat, Missouri
- Joseph T. Robinson , Democrat, Arkansas
- Willard Saulsbury , Democrat, Delaware
- John F. Shafroth , Democrat, Colorado
- Morris Sheppard , Democrat, Texas
- Lawrence Y. Sherman , Republican, Illinois
- John K. Shields , Democrat, Tennessee
- Benjamin F. Shively , Democrat, Indiana. Shively died 14 March 1916; the resultant vacancy was filled first by Thomas Taggart and later by James E. Watson.
- Furnifold M. Simmons , Democrat, North Carolina
- Ellison D. Smith , Democrat, South Carolina
- Hoke Smith , Democrat, Georgia
- John W. Smith , Democrat, Maryland
- Marcus A. Smith , Democrat, Arizona
- William A. Smith , Republican, Michigan
- Reed Smoot , Republican, Utah
- Thomas Sterling , Republican, South Dakota
- William J. Stone , Democrat, Missouri
- George Sutherland , Republican, Utah
- Claude A. Swanson , Democrat, Virginia
- Thomas Taggart , Democrat, Indiana. Taggart was appointed to take Benjamin F. Shively's vacant seat after Shively's death.
- Charles S. Thomas , Democrat, Colorado
- William H. Thompson , Democrat, Kansas
- Benjamin R. Tillman , Democrat, South Carolina
- Charles E. Townsend , Republican, Michigan
- Oscar W. Underwood , Democrat, Alabama
- James K. Vardaman , Democrat, Mississippi
- James W. Wadsworth , Republican, New York
- Thomas J. Walsh , Democrat, Montana
- Francis E. Warren , Republican, Wyoming
- James E. Watson , Republican, Indiana. Watson was elected to fill the vacancy caused by the death of Benjamin F. Shively.
- John W. Weeks , Republican, Massachusetts
- John S. Williams , Democrat, Mississippi
- John D. Works , Republican, California
- John W. Abercrombie , Democrat
- Edward B. Almon , Democrat
- Fred L. Blackmon , Democrat
- John L. Burnett , Democrat
- Stanley H. Dent, Jr. , Democrat
- Oscar L. Gray , Democrat
- James T. Heflin , Democrat
- George Huddleston , Democrat
- William B. Oliver , Democrat
- Henry B. Steagall , Democrat
- Henry S. Benedict , Republican
- Denver S. Church , Democrat
- Charles F. Curry , Republican
- John A. Elston , Progressive
- Everis A. Hayes , Republican
- Julius Kahn , Republican
- William Kent , Independent
- William Kettner , Democrat
- John I. Nolan , Republican
- John E. Raker , Democrat
- Charles H. Randall , Prohibitionist
- William D. Stephens , Progressive
- William C. Adamson , Democrat
- Thomas M. Bell , Democrat
- Charles R. Crisp , Democrat
- Charles G. Edwards , Democrat
- William S. Howard , Democrat
- Dudley M. Hughes , Democrat
- Gordon Lee , Democrat
- Frank Park , Democrat
- Tinsley W. Rucker , Democrat
- Samuel J. Tribble , Democrat
- Carl Vinson , Democrat
- John R. Walker , Democrat
- James W. Wise , Democrat
- Frederick A. Britten , Republican
- Frank Buchanan , Democrat
- Joseph G. Cannon , Republican
- Burnett M. Chiperfield , Republican
- Ira C. Copley , Progressive
- Edward E. Denison , Republican
- George E. Foss , Republican
- Martin D. Foster , Democrat
- Charles Eugene Fuller , Republican
- Thomas Gallagher , Democrat
- Edward J. King , Republican
- Martin B. Madden , Republican
- James R. Mann , Republican
- James McAndrews , Democrat
- James T. McDermott , Democrat
- John C. McKenzie , Republican
- William B. McKinley , Republican
- Henry T. Rainey , Democrat
- William A. Rodenberg , Republican
- Adolph J. Sabath , Democrat
- John A. Sterling , Republican
- Claudius U. Stone Democrat
- Clyde H. Tavenner , Democrat
- Loren E. Wheeler , Republican
- Thomas S. Williams , Republican
- William E. Williams , Democrat
- William W. Wilson , Republican
- John A. M. Adair , Democrat
- Henry A. Barnhart , Democrat
- Cyrus Cline , Democrat
- William E. Cox , Democrat
- William A. Cullop , Democrat
- Lincoln Dixon , Democrat
- Finly H. Gray , Democrat
- Charles Lieb , Democrat
- Merrill Moores , Republican
- Martin A. Morrison , Democrat
- Ralph W. Moss , Democrat
- George W. Rauch , Democrat
- William R. Wood , Republican
- Cassius C. Dowell , Republican
- James W. Good , Republican
- William R. Green , Republican
- Gilbert N. Haugen , Republican
- Harry E. Hull , Republican
- Charles A. Kennedy , Republican
- Christian W. Ramseyer , Republican
- Thomas J. Steele , Democrat
- Burton E. Sweet , Republican
- Horace M. Towner , Republican
- Frank P. Woods , Republican
- Alben W. Barkley , Democrat
- James C. Cantrill , Democrat
- William J. Fields , Democrat
- Harvey Helm , Democrat
- Ben Johnson , Democrat
- David H. Kincheloe , Democrat
- John W. Langley , Republican
- Caleb Powers , Republican
- Arthur B. Rouse , Democrat
- Joseph S. Sherley , Democrat
- Robert Y. Thomas, Jr. , Democrat
- 1 . Allen T. Treadway , Republican
- 2 . Frederick H. Gillett , Republican
- 3 . Calvin D. Paige , Republican
- 4 . Samuel E. Winslow , Republican
- 5 . John J. Rogers , Republican
- 6 . Augustus P. Gardner , Republican
- 7 . Michael F. Phelan , Democrat
- 8 . Frederick W. Dallinger , Republican
- 9 . Ernest W. Roberts , Republican
- 10 . Peter F. Tague , Democrat
- 11 . George H. Tinkham , Republican
- 12 . James A. Gallivan , Democrat
- 13 . William H. Carter , Republican
- 14 . Richard Olney , Democrat
- 15 . William S. Greene , Republican
- 16 . Joseph Walsh , Republican
- Samuel W. Beakes , Democrat
- Louis C. Cramton , Republican
- Frank E. Doremus , Democrat
- Joseph W. Fordney , Republican
- Edward L. Hamilton , Republican
- William F. James , Republican
- Patrick H. Kelley , Republican
- George A. Loud , Republican
- Carl E. Mapes , Republican
- James C. McLaughlin , Republican
- Charles A. Nichols , Republican
- Frank D. Scott , Republican
- John M. C. Smith , Republican
- Sydney Anderson , Republican
- Charles R. Davis , Republican
- Franklin F. Ellsworth , Republican
- Charles A. Lindbergh , Republican
- Clarence B. Miller , Republican
- Thomas D. Schall , Republican
- George R. Smith , Republican
- Halvor Steenerson , Republican
- Carl C. Van Dyke , Democrat
- Andrew J. Volstead , Republican
- Ezekiel S. Candler, Jr. , Democrat
- James W. Collier , Democrat
- Pat Harrison , Democrat
- Benjamin G. Humphreys , Democrat
- Percy E. Quin , Democrat
- Thomas U. Sisson , Democrat
- Hubert D. Stephens , Democrat
- William W. Venable , Democrat
- Samuel A. Witherspoon , Democrat
- Joshua W. Alexander , Democrat
- Charles F. Booher , Democrat
- William P. Borland , Democrat
- Champ Clark , Democrat
- Perl D. Decker , Democrat
- Clement C. Dickinson , Democrat
- Leonidas C. Dyer , Republican
- Courtney W. Hamlin , Democrat
- Walter L. Hensley , Democrat
- William L. Igoe , Democrat
- James T. Lloyd , Democrat
- Jacob E. Meeker , Republican
- Thomas L. Rubey , Democrat
- William W. Rucker , Democrat
- Joseph J. Russell , Democrat
- Dorsey W. Shackleford , Democrat
- Isaac Bacharach , Republican
- William J. Browning , Republican
- John H. Capstick , Republican
- Dow H. Drukker , Republican
- John J. Eagan , Democrat
- Edward W. Gray , Republican
- James A. Hamill , Democrat
- Archibald C. Hart , Democrat
- Elijah C. Hutchinson , Republican
- Frederick R. Lehlbach , Republican
- Richard W. Parker , Republican
- Thomas J. Scully , Democrat
- William S. Bennet , Republican
- Henry Bruckner , Democrat
- Charles P. Caldwell , Democrat
- John F. Carew , Democrat
- Walter M. Chandler , Progressive
- William B. Charles , Republican
- Michael F. Conry , Democrat
- Harry H. Dale , Democrat
- Henry G. Danforth , Republican
- Stephen W. Dempsey , Republican
- Peter J. Dooling , Democrat
- Daniel A. Driscoll , Democrat
- Thomas B. Dunn , Republican
- George W. Fairchild , Republican
- Michael F. Farley , Democrat
- John J. Fitzgerald , Democrat
- Joseph V. Flynn , Democrat
- Norman J. Gould , Republican
- Joseph A. Goulden , Democrat
- Daniel J. Griffin , Democrat
- Charles M. Hamilton , Republican
- Reuben L. Haskell , Republican
- Frederick C. Hicks , Republican
- George M. Hulbert , Democrat
- James W. Husted , Republican
- George W. Loft , Democrat
- Meyer London , Socialist
- Walter W. Magee , Republican
- James P. Maher , Democrat
- Luther W. Mott , Republican
- Woodson R. Oglesby , Democrat
- James S. Parker , Republican
- Thomas G. Patten , Democrat
- Edmund Platt , Republican
- Harry H. Pratt , Republican
- Daniel J. Riordan , Democrat
- Frederick W. Rowe , Republican
- Rollin B. Sanford , Republican
- Isaac Siegel , Republican
- Charles B. Smith , Democrat
- Bertrand H. Snell , Republican
- Homer P. Snyder , Republican
- Oscar W. Swift , Republican
- Charles B. Ward , Republican
- James J. Britt , Republican
- Robert L. Doughton , Democrat
- Hannibal L. Godwin , Democrat
- George E. Hood , Democrat
- Claude Kitchin , Democrat
- Robert N. Page , Democrat
- Edward W. Pou , Democrat
- John H. Small , Democrat
- Charles M. Stedman , Democrat
- Edwin Y. Webb , Democrat
- Alfred G. Allen , Democrat
- William A. Ashbrook , Democrat
- Clement L. Brumbaugh , Democrat
- John G. Cooper , Republican
- Robert Crosser , Democrat
- Henry I. Emerson , Republican
- Simeon D. Fess , Republican
- Warren Gard , Democrat
- William Gordon , Democrat
- David A. Hollingsworth , Republican
- Charles C. Kearns , Republican
- John A. Key , Democrat
- Nicholas Longworth , Republican
- Nelson E. Matthews , Republican
- Roscoe C. McCulloch , Republican
- William C. Mooney , Republican
- Arthur W. Overmyer , Democrat
- Edwin D. Ricketts , Republican
- Joshua E. Russell , Republican
- Isaac R. Sherwood , Democrat
- Robert M. Switzer , Republican
- Seward H. Williams , Republican
- Warren W. Bailey , Democrat
- Andrew J. Barchfeld , Republican
- Cyrus W. Beales , Republican
- Thomas S. Butler , Republican
- John J. Casey , Democrat
- William H. Coleman , Republican
- Peter E. Costello , Republican
- Thomas S. Crago , Republican
- George P. Darrow , Republican
- Arthur G. Dewalt , Democrat
- George W. Edmonds , Republican
- John R. Farr , Republican
- Benjamin K. Focht , Republican
- Mahlon M. Garland , Republican
- George S. Graham , Republican
- William W. Griest , Republican
- Robert D. Heaton , Republican
- Robert F. Hopwood , Republican
- Abraham L. Keister , Republican
- Edgar R. Kiess , Republican
- Aaron S. Kreider , Republican
- Daniel F. Lafean , Republican
- John V. Lesher , Democrat
- Michael Liebel, Jr. , Democrat
- Louis T. McFadden , Republican
- Samuel H. Miller , Republican
- Joseph H. Moore , Republican
- John M. Morin , Republican
- Solomon T. North , Republican
- Stephen G. Porter , Republican
- Charles H. Rowland , Republican
- John R. K. Scott , Republican
- Henry J. Steele , Democrat
- Henry W. Temple , Republican
- William S. Vare , Republican
- Henry W. Watson , Republican
- Richard W. Austin , Republican
- Joseph W. Byrns , Democrat
- Finis J. Garrett , Democrat
- William C. Houston , Democrat
- Cordell Hull , Democrat
- Kenneth D. McKellar , Democrat
- John A. Moon , Democrat
- Lemuel P. Padgett , Democrat
- Sam R. Sells , Republican
- Thetus W. Sims , Democrat
- Eugene Black , Democrat
- James P. Buchanan , Democrat
- George F. Burgess , Democrat
- Oscar Callaway , Democrat
- James H. Davis , Democrat
- Martin Dies , Democrat
- Joe H. Eagle , Democrat
- John N. Garner , Democrat
- Alexander W. Gregg , Democrat
- Rufus Hardy , Democrat
- Robert L. Henry , Democrat
- Atkins J. McLemore , Democrat
- Samuel T. Rayburn , Democrat
- James L. Slayden , Democrat
- William R. Smith , Democrat
- John H. Stephens , Democrat
- Hatton W. Sumners , Democrat
- James Young , Democrat
- Charles C. Carlin , Democrat
- Henry D. L. W. Flood , Democrat
- Carter Glass , Democrat
- Thomas W. Harrison , Democrat
- James Hay , Democrat
- Edward E. Holland , Democrat
- William A. Jones , Democrat
- Andrew J. Montague , Democrat
- Edward W. Saunders , Democrat
- Campbell B. Slemp , Republican
- Walter A. Watson , Democrat
- George M. Bowers , Republican
- William G. Brown, Jr. , Democrat
- Edward Cooper , Republican
- Adam B. Littlepage , Democrat
- Hunter H. Moss, Jr. , Republican
- Matthew M. Neely , Democrat
- Howard Sutherland , Republican
- Harry C. Woodyard , Republican
- Edward E. Browne , Republican
- Michael E. Burke , Democrat
- William J. Cary , Republican
- Henry A. Cooper , Republican
- John J. Esch , Republican
- James A. Frear , Republican
- Thomas F. Konop , Democrat
- Irvine L. Lenroot , Republican
- John M. Nelson , Republican
- Michael K. Reilly , Democrat
- William H. Stafford , Republican
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