|• Mayor||Sebastian Schönbuchner (ÖVP)|
|• Total||23 km2 (9 sq mi)|
|Elevation||520 m (1,710 ft)|
|Population (1 January 2016)|
|• Density||110/km2 (290/sq mi)|
|Time zone||CET (UTC+1)|
|• Summer (DST)||CEST (UTC+2)|
Großgmain lies in the Salzburg Flachgau region in the northern foothills of the Untersberg massif, directly on the border with Bayerisch Gmain in the German state of Bavaria. The Austrian-German border runs along the Weißbach creek, a tributary of the Saalach river.
The Gmain area, first mentioned in a 712 deed of donation issued by Duke Theodbert of Bavaria, is an old settlement ground, a fertile plain stretching along the northern rim of the Berchtesgaden Alps. Archaeological findings date back to the Bronze Age; in the Middle Ages it became the centre of the dominions held by the Bavarian Counts of Plain, who had the Plainburg erected as their residence.
When the Archbishops of Salzburg achieved the status of Prince-bishops, the Weißbach became the western border of the immediate estates in the region. Though the villages of Großgmain und Bayerisch Gmain were part of different dominions, the sense of a common bond among the local population was preserved up to today.
Seats in the municipal assembly (Gemeinderat) as of 2014 local elections:
- Austrian People's Party (ÖVP): 10
- Social Democratic Party of Austria (SPÖ): 3
- Freedom Party of Austria (FPÖ): 3
- The Greens – The Green Alternative: 3
- Cesar Bresgen (1913–1988), composer, lived in Großgmain from 1956
- Josef Meinrad (1913–1996), actor, died in Großgmain
- Ilse Aichinger (born 1921), writer, lived in Großgmain from 1963 to 1981
- Lolita (1931–2010), singer, lived in Großgmain until her death.