Allegheny County

The flag of Allegheny County, Pennsylvania, is a navy blue background with the county's seal placed in the center of the flag.
The flag was adopted in 1902, and designed by an unknown author.Flag of Allegheny County, Pennsylvania at Wikimedia Commons
==References==
Category:United States Counties
Category:Pennsylvania
Category:Proportions 3-5
Category:Blue
Category:Blue background
Category:Seal
Category:Yellow
Category:Green
Category:Ships
Category:Eagles