Sill may refer to:
- Fort Sill, a United States Army post near Lawton, Oklahoma
- Mount Sill, a California mountain
- Sill, Swedish word for herring (the Norwegian and Danish equivalent is sild, the Icelandic is síld)
- Sill (dock), a weir at the low water mark retaining water within a dock
- Sill (geology), a subhorizontal sheet intrusion of molten or solidified magma
- Sill, a shoal near the mouth of a fjord, remnant of an extinct glacier’s terminal moraine
- Sill (geostatistics)
- Sill plate, a construction element
- Window sill, a more specific construction element than above
- Automotive sill, also known as a rocker; see Glossary of automotive design#R
- Sill (river), a river in Austria
- Sills Cummis & Gross (formerly Sills, Beck, Cummis, Radin, Tischman & Zuckerman), a U.S. corporate law firm
Name
- Beverly Sills (1929–2007), American operatic soprano
- Douglas Sills (born 1960), American actor
- Edward Rowland Sill (1841–1887), American poet and educator
- Eileen Sills, a British chief nurse and NHS national guardian
- Joshua W. Sill (1831–1862) American Civil War brigadier general
- Judee Sill (1944–1979), American singer and songwriter
- Lester Sill (1918–1994), American record label executive
- Paul Sills (1927–2008), director and improvisation teacher, and the original director of Chicago's The Second City
- Tim Sills (born 1979), English footballer
- Zach Sill (born 1988), Canadian ice hockey player
See also
- Cill (disambiguation)
- Still, a permanent apparatus used to distill miscible or immiscible (e.g. steam distillation) liquid mixtures by heating to selectively boil and then cooling to condense the vapor
- Still (disambiguation)