There were 40 Massachusetts Senators in the the 1883 Massachusetts legislature.
Chas. H. Allen James S. Allen John R. Baldwin Alvan Barrus Charles P. Barton Theodore C. Bates Edwin Bowley George A. Bruce George G. Crocker John W. Cummings Benjamin F. Cutter Lincoln Drake Knowles Freeman Owen Galvin Charles F. Gerry Onslow Gilmore William H. Haile Dexter B. Hitchcock George W. Johnson Joseph P. Johnson Rufus Livermore Warren E. Locke Edward P. Loring Benjamin S. Lovell Peleg McFarlin James A. McGeough Walter N. Mason James O. Parker Charles B. Pratt Charles S. Randall David Randall Frederick S. Risteen Charles A. Sayward John M. Seeley John H. Sherburne William Sparhawk Isaac A.S. Steele Foster E. Swift Arthur W. Tufts Henry J. Wells 
