Oregon flag the only U.S. state flag that displays different images on front and back. Photo by Holly Hayes / Flickr (noncommercial use permitted with attribution).
Official State Flag of Oregon
The Oregon state flag was adopted in 1925 and is the only U.S. state flag that displays different images on front and back. All State Flags
The Oregon flag has gold lettering and symbols on a field of navy blue (Oregon's state colors). The flag's face displays part of the state seal and the words "STATE OF OREGON" and "1859" (the year Oregon was admitted to the Union). The parade flag (or "dress flag") has a gold fringe, but the utility flag has a plain border.
The symbols on the shield include the mountains and forests of Oregon, an elk with branching antlers, a covered wagon and ox team, the Pacific Ocean with a setting sun, a departing British man-of-war ship (a symbol of the departure of British influence in the region) and an arriving American merchant ship (a symbol of the rise of American power). The 33 stars supporting the shield signify that Oregon was the 33rd state to join the Union.
The reverse of the flag pictures Oregon's official state animal - the beaver (Oregon's nickname is The Beaver State, stemming from the early 19th century when fur hats were fashionable and Oregon’s streams were an important source of beaver).