Sejny County (Polish: powiat sejneński) a unit of territorial administration
and local government (powiat) in Podlaskie Voivodeship, in the extreme
north-east of Poland, on the border with Lithuania and Belarus. It came into
being on January 1, 1999, as a result of the Polish local government reforms
passed in 1998. Its administrative seat and only town is Sejny.
A proposal of the Sejny County flag presented in 2011 Proposal Flag is
horizontally divided red-yellow-red (1:3:1) with a black bull in center of
cloth. A typical "Spanish" design.