Current party leaders of the United States Senate
The party leadership of the United States Senate refers to the officials elected by the Senate Democratic Caucus and the Senate Republican Conference to manage the affairs of each party in the See. Each party is led by a floor leader who directs the legislative agenda of his caucus in the Senate, and who is augmented by an Assistant Leader or Whip, and several other officials who work together to manage the floor schedule of legislation, enforce party discipline; oversee efforts to elect new Senators, and maintain party unity.
The titular, non-partisan leaders of the Senate itself are the Vice President of the United States, who serves as President of the Senate, and the President pro tempore, the seniormost member of the majority, who theoretically presides in the absence of the Vice President.
Unlike committee chairmanships, leadership positions are not traditionally conferred on the basis of seniority, but are elected in closed-door caucuses.
Republican leadership
| Position | Name | State | Notes |
| Floor Leader | Mitch McConnell | Kentucky | The Senate Majority Leader, who serves as leader of the Senate Republican Conference and manages the legislative business of the Senate |
| Majority Whip | John Thune | South Dakota | The Senate Majority Whip, who manages votes and communicates with individual senators and ensures passage of bills relevant to the agenda and policy goals of the Senate Republican Conference |
| Republican Conference Chair | John Barrasso | Wyoming | Oversees floor leader election, helps lead policy initiatives and policy proposals |
| Republican Policy Committee Chairman | Roy Blunt | Missouri | Policy liaison between committees and conference legislation |
| Chairman of the National Republican Senatorial Committee | Todd Young | Indiana | Responsible for overseeing efforts to elect Republicans to the Senate |
| Vice Chair of the Senate Republican Conference | Joni Ernst | Iowa | Takes minutes and assists chair with conference operations |
| President pro tempore | Chuck Grassley | Iowa | The longest-serving Republican senator, not formally part of Republican leadership |
| President of the Senate | Mike Pence | Not a Senator; see Vice President of the United States |
Democratic leadership in the United States Senate
Since January 3, 2015, the Democratic Party has constituted a minority in the United States Senate.| Position | Name | State | Notes |
| Floor Leader | Chuck Schumer | New York | Senate Minority Leader |
| Minority Whip | Dick Durbin | Illinois | Senate Minority Whip; Position traditionally the same as Assistant Floor Leader, but split into two so that Patty Murray could become Assistant Floor Leader |
| Assistant Floor Leader | Patty Murray | Washington | Assistant Minority Leader; third-ranking democrat in the Senate Democratic Caucus. Position created in 2016 after Reid's retirement to settle possible rivalry between Murray and Durbin for the whip post. |
| Vice Chairman of the Democratic Caucus | Mark Warner Elizabeth Warren | Virginia Massachusetts | Position created for Schumer after successful tenure as DSCC chairman |
| Senate Democratic Conference Secretary | Tammy Baldwin | Wisconsin | Responsible for managing the policy agenda for the Senate Democratic Conference |
| Chairman of the Democratic Senatorial Campaign Committee | Chris Van Hollen | Maryland | Responsible for overseeing efforts to elect Democrats to the Senate |
| Chair Senate Democratic Policy Committee | Debbie Stabenow | Michigan | Responsible for relations between Senate committees and the Senate Democratic Conference |
| Chairman of the Steering Committee | Amy Klobuchar | Minnesota | Responsible for fostering relations between Senate Democrats and community leaders and interest groups |
| Vice Chairman of Policy and Communications Committee | Joe Manchin | West Virginia | Assists caucus with policy proposals, outreach, legislative research, and party unity |
| Chief Deputy Whip | Jeff Merkley | Oregon | Assists the Whip in managing Democratic votes and communicating leadership strategy with Senate Democrats |
| President Pro Tempore of the United States Senate Emeritus | Patrick Leahy | Vermont | Honorary member of the leadership team |