| Großdietmanns | |
| Settlement Type: | Municipality |
| Pushpin Map: | Austria |
| Pushpin Mapsize: | 270 |
| Pushpin Map Caption: | Location within Austria |
| Coordinates: | 48.4667°N 24°W |
| Subdivision Type: | Country |
| Subdivision Name: | Austria |
| Subdivision Type1: | State |
| Subdivision Name1: | Lower Austria |
| Subdivision Type2: | District |
| Subdivision Name2: | Gmünd |
| Parts Style: | para |
| Leader Title: | Mayor |
| Leader Name: | Johann Weissenbök |
| Elevation M: | 497 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Timezone Dst: | CEST |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
| Postal Code Type: | Postal code |
| Postal Code: | 3950 |
| Area Code Type: | Area code |
| Area Code: | 02852 |
| Website: | www.grossdietmanns.gv.at |
Großdietmanns is a town in the district of Gmünd in the Austrian state of Lower Austria.
Großdietmanns lies in the valley of the Lainsitz in the Waldviertel in Lower Austria. About 25.6 percent of the municipality is forested.