Flag of Dayton, Ohio
| Use | Civil flag |
|---|---|
| Proportion | 3:5 |
| Adopted | December 15, 2021 |
| Designed by | Catapult Creative |
| Use | Official pennant |
| Adopted | August 15, 1917 |
The flag of Dayton, Ohio was adopted on December 15, 2021, and created by Dayton design and marketing firm Catapult Creative. The cost to the city for the design and an accompanying video was $4,300 (equivalent to $5,100 in 2025).