Kenneth Roy Bennett is an American politician. A member of the Republican Party, he has been a member of the Arizona Senate since 2023. He previously was a member of the state Senate from 1999 to 2007, and president of the state Senate from 2003 to 2007. He was Secretary of State of Arizona from 2009 to 2015. He unsuccessfully ran for governor of Arizona in the 2014 and 2018 elections.

The Arizona State Senate is part of the Arizona Legislature, the state legislature of the US state of Arizona. The Senate consists of 30 members each representing an average of 219,859 constituents. Members serve two-year terms with term limits that limit Senators to a maximum four consecutive terms before requiring a one-term respite prior to running again. Members of the Republican Party are currently the majority in the Senate. There are currently 16 women serving in the Senate after Raquel Terán was appointed, making it the first time a majority of the body was composed of female members.