Longwood may refer to:
- in Australia
- Longwood, Victoria, Australia
- in Canada
- Battle of Longwoods
- in India
- Longwood, Shimla, India
- in Ireland
- Longwood, County Meath, Ireland
- in the United Kingdom
- Longwood, West Yorkshire, England
- Longwood, Saint Helena
- in the United States
(by state)
- Longwood, Florida
- Longwood Historic District (Longwood, Florida), listed on the NRHP in Florida
- Longwood (Baton Rouge, Louisiana), listed on the NRHP in Louisiana
- Longwood (MBTA station) in Boston, Massachusetts
- Longwood Medical and Academic Area in Boston, Massachusetts
- Longwood Historic District (Brookline, Massachusetts), listed on the NRHP in Massachusetts
- Longwood Cricket Club in Chestnut Hill, Massachusetts
- Longwood (Natchez, Mississippi), octagonal antebellum mansion, a U.S. National Historic Landmark
- Longwood, Bronx, New York
- Longwood Central School District on Long Island, New York
- The Longwood Estate, part of Manor St. George in Ridge, New York
- Longwood Historic District (Bronx, New York), listed on the NRHP
- Longwood (Milton, North Carolina), listed on the NRHP in North Carolina
- Longwood Gardens District, Hamorton, PA, listed on the NRHP in Pennsylvania
- Longwood Gardens in Kennett Square, Pennsylvania
- Longwood (Earlysville, Virginia), listed on the NRHP in Virginia
- Longwood (Gordonville, Virginia), listed on the NRHP in Virginia
- Longwood University in Farmville, Virginia
- Longwood, Wisconsin, a town
- Longwood (community), Wisconsin, an unincorporated community