THE UPPER CHAMBER
Two senators for every state, whatever its population. Six-year terms, staggered in three classes so about a third of the chamber faces voters every two years.
PARTY CONTROL
Republicans hold 53 of 100 seats
53 Republicans · 45 Democrats · 2 independents
Also in leadership: Tom Cotton (Republican Conference Chair) · Christopher Murphy (Democratic Conference Deputy Secretary) · Brian Schatz (Democratic Conference Deputy Secretary) · Tammy Baldwin (Democratic Conference Secretary) · Mark R. Warner (Democratic Conference Vice Chair) · Elizabeth Warren (Democratic Conference Vice Chair) · Bernard Sanders (Democratic Outreach Chair) · Catherine Cortez Masto (Democratic Outreach Vice Chair) · Amy Klobuchar (Democratic Steering Committee Chair) · Cory A. Booker (Democratic Strategic Communications Committee Chair) · Tim Scott (Republican Committee Chair) · James Lankford (Republican Conference Vice Chair) · Shelley Moore Capito (Republican Policy Committee Chair)
Every seat, grouped by party. Hover to identify; click or tap to pin.
THREE CLASSES · THREE ELECTION DAYS
Pick any seat on the floor or the map to see who holds it and when it is next on the ballot.
Left half is the senator who has served longer in Congress. A gold bar marks a seat on the Nov 3 ballot.
DELEGATIONS
DELEGATIONS
SELECTED SEAT
Pick either half of a state to select that senator.
SPLIT DELEGATIONS
States whose two senators belong to different parties.
THE RECORD
Attendance is counted straight from the roll-call record: every vote a senator could have cast and didn’t. No commentary, just the count.
Share of roll calls missed, 119th Congress (915 roll calls)
Each bar is an unbroken run of missed roll calls, ranked by votes missed in a row. Recess weeks don’t count, because there are no votes to miss.
Today · a red bar means the absence is still going
By the year first sworn in to Congress
66median senator’s age.
OLDEST
Ages as of Oct 2, 2026, from official birth dates.
All 4 were appointed, not elected. Voters get their say on the next ballot.