Flag of Trondheim
| Use | Civil flag |
|---|---|
| Proportion | 2:3 |
| Adopted | 1989 |
| Design | A red field and a yellow Trondheim rose at center. |
| Designed by | Arne E. Holm |
The flag of Trondheim is one of the official symbols of the city and municipality of Trondheim in Norway.
Most Norwegian municipalities have a banner of their respective coats of arms as a flag. Trondheim has no modern heraldic coat of arms, but a seal unsuitable as a banner of arms, a yellow "Trondheim rose" on a red field was chosen for the flag of Trondheim. The designer of the flag was professor Arne E. Holm, whose proposal was approved by the municipal council in 1989, and confirmed by royal order the same year.