In government, unicameralism (Latin uni, one + camera, chamber) is the practice of having one legislative or parliamentary chamber. Thus, a unicameral parliament or unicameral legislature is a legislature which consists of one chamber or house. Some countries with unicameral legislatures are often small and homogeneous unitary states and consider an upper house or second chamber unnecessary.

Unicameral legislatures exist when there is no widely perceived need for multicameralism. Many multicameral legislatures were created to give separate voices to different sectors of society. Multiple chambers allowed for guaranteed representation of different social classes (as in the Parliament of the United Kingdom or the French States-General), ethnic or regional interests, or subunits of a federation. Where these factors are unimportant, in unitary states with weak regional identity, unicameralism often prevails. Sometimes, as in New Zealand and Denmark, this comes about through the abolition of one the two chambers, or, as in Sweden, through the merger of the two chambers into a single one, while in others a second chamber has never existed.

Gary LeBeau (born June 1, 1947) is the State Senator in Connecticut from the third senatorial district serving the towns of East Hartford, South Windsor, East Windsor, and Ellington. Gary was first elected to the State Senate in 1996. Gary is currently serving his 6th term as senator.

Born and raised in Easthampton, Massachusetts, Senator LeBeau was educated in public schools and graduated from the University of Massachusetts with a Masters Degree in Education, a Sixth-Year Degree from the University of Connecticut, and Elementary Education Certification from Central Connecticut State University. A former public school teacher for 36 years, Senator LeBeau is now retired. He lives in East Hartford with his wife Joanne, their three children Kara, Matthew and Christopher, and their chocolate Labrador Retriever “Hershey.”

LeBeau was first elected to the Connecticut General Assembly in 1990 as a state representative from the town of East Hartford. While in the state House, he served on the Finance Committee and as vice-chairman of the Commerce Committee. He was first elected to the state Senate in 1996, where he represents the 3rd Senatorial District towns of East Hartford, South Windsor, East Windsor and Ellington. In his time in the Senate, LeBeau has advocated for a state commitment to the Groton-area submarine base which helped save it from the federal budget axe; tax credits for job creation; major investments in biotechnology, stem cell research and alternative energies such as fuel cells; linking the research departments of various state institutions of higher learning with start-up, high-technology firms; contracting reform; Goodwin College; and the Rentschler Field complex.^{[citation needed]} Senator LeBeau has also championed a transportation study of the Buckland shopping mall area and a legislative Task Force on Fatherhood.^{[citation needed]}