DCGS may refer to:

• Dr Challoner's Grammar School, established in England in 1624
• Distributed Common Ground System, US military intelligence system
• Distributed Common Ground System-Army
• Deputy Chief of the General Staff (United Kingdom)

• ATC code G04BD01
• ATC code G04BD02
• ATC code G04BD03
• ATC code G04BD04
• ATC code G04BD05
• ATC code G04BD06
• ATC code G04BD07
• ATC code G04BD08
• ATC code G04BD09
• ATC code G04BD10
• ATC code G04BD11
• ATC code G04BE
• ATC code G04BE01
• ATC code G04BE02
• ATC code G04BE03
• ATC code G04BE04
• ATC code G04BE05
• ATC code G04BE06
• ATC code G04BE07
• ATC code G04BE08
• ATC code G04BE09
• ATC code G04BX
• ATC code G04BX01
• ATC code G04BX03
• ATC code G04BX06