K Street can refer to:
- K Street (street), a street located in Washington, D.C., United States
- Lobbying industry in the United States, as a figure of speech, many lobbyists have offices on this street
- K Street (TV series), a 2003 HBO television series
- K Street Project, a lobbying effort by the Republican Party
- The K Street Gang: the Rise and Fall of the Republican Machine, a book by Matthew Continetti