Sankt Johann am Wimberg is a municipality in the district of Rohrbach in the Austrian state of Upper Austria.

Sankt Johann am Wimberg lies in the eastern part of the district of Rohrbach in the upper Mühlviertel.

In terms of the nature conservation spatial division, the south-western part of the municipal area belongs to the Central Mühlviertel Highlands spatial unit, while the north-eastern part belongs to the Southern Bohemian Forest Foothills spatial unit.

This puts St. Johann am Wimberg in the middle of the district's municipalities.

[3] Neighboring municipalities are Helfenberg in the north, St. Veit im Mühlkreis in the east, Niederwaldkirchen in the south, St. Ulrich im Mühlkreis in the southwest and St. Peter am Wimberg in the west.