The 48th Oklahoma Legislature convened on January 2, 2001, for organizational purposes. The roll call of members elected to the Senate in November included three new members: Senators Jonathan Nichols, Jim Reynolds, and Nancy Riley

The 2nd Session of the 48th Legislature convened on Monday, February 4, 2002. During the session, the Senate introduced 870 bills and 15 joint resolutions and the House introduced 959 bills and 30 joint resolutions for a combined total of 1874 measures. An additional 1217 bills and joint resolutions, carried over from the 1st Session, were available for consideration

The 49th Oklahoma Legislature convened on January 7, 2003, for organizational purposes. Senator Cal Hobson was elected as President Pro Tempore of the Senate. Officers of the majority and minority parties were announced and seated, including Majority Floor Leader, Senator Ted Fisher, and Minority Floor Leader, Senator James Williamson

The second session of the 49th Oklahoma Legislature convened on Monday, February 2, 2004. The session was unique in that it would be the last for more than 40 members of the House and Senate due to consti-tutionally mandated term limits approved by voters in 1990. It also included several high-profile legislative measures

The first session of the 50th Legislature featured an ambitious agenda, addressing a variety of high-profile issues ranging from a $500 million higher education bond proposal (SB 745, HB 1191), a landmark road and bridge funding agreement (HB 1078), a significant tax relief package (SB 435, HB 1547), and prescription drug assistance (SB 547), as well as laws aimed at giving citizens greater protection from criminals while enhancing the investigative tools law enforcement needs to bring criminals to justice.

In the second session of the 50th Legislature, the Oklahoma State Senate considered 1034 new Senate Bills and 608 carryover Senate Bills, 539 House bills, 32 Senate Joint Resolutions, 14 House Joint Resolutions, 26 Senate Concurrent Resolutions, 29 House Concurrent Resolutions and 71 Simple Resolutions. Of those measures, 160 Senate Bills and 167 House Bills were signed into law, while 3 Senate Bills and 3 House Bills were vetoed. Two constitutional amendments (SJR 37 & HJR 1066) and 83 Senate Concurrent or Simple resolutions were filed with the Secretary of State.

The first session of the 51st Legislature convened in January 2007, the year marking Oklahoma’s 100th anniversary of entering the union as the 46th state. In addition to planned Centennial celebrations in communities throughout the state, the Legislature also agreed to meet in November of 2007 for a ceremonial session to be held in Guthrie, the original state capital of Oklahoma.

In the second session of the 51st Legislature, the Oklahoma State Senate considered 1,069 new Senate Bills and 769 carryover Senate Bills, 472 House bills, 31 Senate Joint Resolutions, 31 carryover Senate Joint Resolutions, 18 House Joint Resolutions, 61 Senate Concurrent Resolutions, 34 House Concurrent Resolutions and 54 Simple Resolutions.  Of those measures, 248 Senate Bills and 191 House Bills were signed into law; while eight Senate Bills and four House Bills were vetoed (the veto of SB 1878 was overridden).  Three constitutional amendments (HB 3354 and SJRs 29 and 38) and 91 Senate C

The First Session of the 52nd Legislature convened in January 2009.  For the first time in state history, Republicans held a majority of seats in the Oklahoma State Senate.  The upper chamber had been tied in the 51st Legislature, with each caucus controlling 24 seats. Senator Glenn Coffee, who previously held the title of Co-President Pro Tempore under the power sharing agreement, was elected President Pro Tempore.  Senator Charlie Laster was selected by his caucus as Democratic Floor Leader. 

In the second session of the 52nd Legislature, the Oklahoma State Senate considered 1,082 new Senate Bills and 45 carryover Senate Bills, 505 House Bills, 28 Senate Joint Resolutions, 2 carryover Senate Joint Resolutions, 15 House Joint Resolutions, 32 Senate Concurrent Reso-lutions, 19 House Concurrent Resolutions and 71 Simple Resolutions. Of those measures, 208 Senate Bills and 235 House Bills were signed into law, while 12 Senate Bills and 19 House Bills were vetoed (the vetoes of HBs 2656, 2780 and 3284 were overridden).