Gallagher may refer to:
Places
United States
- Gallagher Township, Pennsylvania
- Gallagher, West Virginia, an unincorporated place
People
- Gallagher (surname)
- Gallagher (comedian), stage name of Leo Anthony Gallagher Jr.
- Gallagher family, Irish clan
Other
- Arthur J. Gallagher & Co., American insurance brokerage
- The Gallagher Index, in political science
- The Gallagher Group (UK), construction and quarrying firm
- "Gallagher" (Space Ghost Coast to Coast), a television episode