"political entity" is a correct and usable phrase in written English.
You could use it to refer to a type of government, for example: "This nation is an independent political entity."
As Ms. Sobel's book clearly indicates, the Catholic Church in Galileo's time was a very powerful political entity and as such engaged in politics and political intrigue just as any other political entity might.
It is neither an administrative nor a political entity.
Keiyō is neither an administrative nor a political entity.
Tōkai is neither an administrative nor a political entity.
Bhutan probably became a distinct political entity about this period.
It is a political entity, and it is never safe to presume to believe the words of a political entity.
Can this energy coagulate into a single political entity?
Serbia is the major political entity in Yugoslavia.
There is, in reality, one political entity that matters.
"You can't turn the association into a political entity".
And it's unfortunate, because breast-feeding isn't a political entity.
