Casement may refer to:
- Casement Aerodrome, an airfield to the south west of Dublin, Ireland
- Casement Park, the principal Gaelic Athletic Association stadium in Belfast, Northern Ireland
- Casement window, a window that is attached to the window frame with hinges at the side
- a military casement, more commonly spelled casemate
People with the surname Casement:
- Chris Casement (born 1988), Northern Irish professional footballer
- Frances Jennings Casement (1840-1938), American suffragette
- John S. Casement (1829-1909), Union Army officer
- Roger Casement (1864-1916), Irish patriot, poet, revolutionary and nationalist