William G. Folden is an American politician who is currently a Republican member of the Maryland Senate, representing District 4 since 2023. He was previously a member of the Maryland House of Delegates, representing District 3B from 2015 to 2019.

The Maryland Senate, sometimes referred to as the Maryland State Senate, is the upper house of the General Assembly, the state legislature of the U.S. state of Maryland. Composed of 47 senators elected from an equal number of constituent single-member districts, the Senate is responsible, along with the Maryland House of Delegates, for passage of laws in Maryland, and for confirming executive appointments made by the Governor of Maryland.