HGS
HGS stands for:
- Hastings Airfield (IATA code), airfield in Sierra Leone near the state capital Freetown
- Goslar train station (DS100 code)
- Hervormd-Gereformeerde Staatspartij , a former Dutch political party
- Humboldtgymnasium Solingen , an urban high school in the independent city of Solingen
- Heimstättengesellschaft Sachsen - formerly cooperative housing association in Dresden in the 1920s
HgS is an abbreviation for:
- Main command post , command post of the People's Navy of the GDR in the event of war
- Mercury sulfide , a chemical compound made up of mercury and sulfur