ATCOM may refer to:

• The United States Army Aviation and Missile Command (ATCOM)
• Atcom S.A., an Athens based, software company

• Upper St. Clair, Pennsylvania
• Upper St. Clair School District
• Upper St. Clair Township, Pennsylvania
• Upper Steenbras Dam
• Upper Stepney
• Upper Stevens Creek Falls
• Upper Stillwater
• Upper Stillwater Reservoir
• Upper Stondon
• Upper Stone Canyon Reservoir
• Upper Stratosphere
• Upper St. Regis, New York
• Upper-structure triad
• Upper Stuart Street, Dunedin
• Upper Subansiri
• Upper Sugarloaf Key
• Upper Summit Lake (British Columbia)
• Upper Sure National Park
• Upper Svaneti
• Upper Swabian Plain
• Upper Swandam Lane
• Upper Swell, Gloucestershire
• Upper Table Rock
• Upper Tahltan 4
• Upper Tahltan Indian Reserve 4