Black Site or blacksite or variations may refer to:
- Black site, a secret military or prison site
- CIA black sites, black sites run by the CIA during the war on terror
- BlackSite: Area 51, a 2007 video game
- Big Black Site, Eagle Lake, Maine, in the National Register of Historic Places (NRHP) listings in Aroostook County, Maine
- Black Site (Greenwood, Mississippi), in the NRHP listings in Leflore County, Mississippi
- Black Site (Sidon, Mississippi), in the NRHP listings in Leflore County, Mississippi
- Black Site (2022 film), a film directed by Sophia Banks
- Black Site (2018 film), a British science-fiction action horror film
- "Black Site", a 2017 episode of Voltron: Legendary Defender