SCA territory is divided into:
The first four are classical British terms for political units, the fifth is more of a military term, but still Britt. But Canton is French, and to the best of my knowledge was never used outside of France and Switzerland (except for more recent appearances in Ohio and southern China).
The word they are looking for, I believe, is County, as in the domain of a count.
Tangentially, how come SCA doesn't have any empires? Or do they?