601st
- 601
- 601 (disambiguation)
- 601 (number)
- 601 Assault Helicopter Battalion
- 601 BC
- 601st (City of Bristol) (Mixed) Heavy Anti-Aircraft Regiment, Royal Artillery
- 601st (Harwich) Fortress Company, Royal Engineers
- 601st (The West Yorkshire Regiment) Infantry Regiment, Royal Artillery
- 601st Air Operations Center
- 601st Bombardment Squadron
- 601st Communications Grouping
- 601st Engineer Grouping
- 601st Naval Air Group
- 601st Quartermaster Company
- 601st Special Forces Group
- 601st Squadron (JASDF)
- 601st Tactical Control Wing
- 601st Tank Destroyer Battalion
- Batallón de Inteligencia 601
- The 601st Phone Call