The first session of the 53rd Oklahoma Legislature started with historic turnover, with the election of Mary Fallin as the first woman Governor in state history and the selection of new legislative leadership, including Senate President Pro Tempore Brian Bingman and Speaker of the House of Representatives Kris Steele. The Senate welcomed ten new members: Senators Mark Allen, Josh Brecheen, Rick Brinkley, Kim David, Eddie Fields, David Holt, Rob Johnson, Ralph Shortey, Frank Simpson, and Greg Treat; along with 21 new state Representatives.

The 2012 Oklahoma Legislative Session convened on February 6 and adjourned sine die on May 25, 2012, under the leadership of Senator Brian Bingman, President Pro Tempore, Senator Mike Schulz, Majority Floor Leader and Senator Sean Burrage, Democratic Floor Leader. The Legislature considered over 2,000 bills and joint resolutions, of which 171 Senate measures and 221 House measures became law. Governor Mary Fallin vetoed 11 measures.

The 2013 Oklahoma Legislative Session convened on January 8, 2013, for its biennial organizational day, and then reconvened in regular session on February 4 and adjourned sine die on May 24, 2013, a week earlier than the constitutionally mandated date. The Senate welcomed eight new members to the 54th Legislature: Senators Larry Boggs, Corey Brooks, Nathan Dahm, Kyle Loveless, Ron Sharp, Wayne Shaw, Jabar Shumate and Rob Standridge.

The 2014 Oklahoma Legislative Session convened on February 3, 2014, and adjourned sine die on May 23, 2014, a week earlier than required in the Oklahoma Constitution.  The officers of the Senate for 2013 were continued, including Senator Brian Bingman, President Pro Tempore, Senator Mike Schulz, Majority Floor Leader and Senator Sean Burrage, Democratic Floor Leader.  The Legislature considered 2,399 bills and joint resolutions, of which 188 Senate measures and 213 House measures became law.  Governor Mary Fallin vetoed 35 measures and two of those vetoes were overridden by the Legislature.

The 2015 Oklahoma Legislature convened on January 6, 2015, for the purpose of performing its duties as required in Section 5 of Article VI of the Oklahoma Constitution and organizing pursuant to the provisions of Article V of the Oklahoma Constitution.  The Legislature reconvened on Monday, February 2, 2015, and adjourned sine die on May 22, 2015, a week earlier than required in the Oklahoma Constitution.

The 2016 Oklahoma Legislature convened on Monday, February 1, 2016, and adjourned sine die on May 27, 2016, as required in the Oklahoma Constitution.

The 1st Session of the 56th Oklahoma Legislature convened to organize on January 3, 2017 for the purpose of performing its duties as required in Section 5 of Article VI of the Oklahoma Constitution and organizing pursuant to the provisions of Article V of the Oklahoma Constitution. The Legislature reconvened on Monday, February 6, 2017, and adjourned sine die on May 26, 2017, as required in the Oklahoma Constitution.

Prior to the 2nd Session of the 56th Legislature, the Senate and House convened the 1st and 2nd Special Session of the 56th Legislature. Due to the funding shortfall resulting from the Oklahoma Supreme Court’s decision in Naifeh v. The State of Oklahoma (2017 OK 63), the Legislature needed to raise or cut spending by $215 million to balance the budget. The loss of this revenue primarily affected the Oklahoma Health Care Authority, Oklahoma Department of Mental Health and Substance Abuse, and the Department of Human Services.

The Senate convened for the 1st Session of the 57th Legislature on January 8th, 2019, to adopt Senate rules governing the Session, certify the 2018 election results, and to elect a new President Pro Tempore. Sen. Greg Treat (2011-Present) was unanimously elected. Following the President Pro Tempore election, Sen. Kim David was named the Majority Floor Leader and Sen. Kay Floyd was named as the Minority Floor Leader. The Senate adopted the rules and members were appointed to standing committees of the Senate.