Ethnic minorities (Tibetans, Mongols, etc.) have a legally recognized status, with affirmative action policies, (some) exemption from the one-child policy, etc.
By that standard Western countries also don't have one class of citizens.
Depends of which country you're thinking of! The US has officially designated categories, but those are pretty much illegal in France, and any official mention of one's "ethnicity" is pretty much a taboo concept (and I found it weird to have to fill in that field in all my paperwork in China).
And even the ethnic categories in the US don't seem as "legally relevant" as ethnic minority status in China; the law is (from what I understand) that you can sue if you believe you've been denied an opportunity because of your ethnic background, b...
As Multiheaded added, "Personal is Political" stuff like gender relations, etc also may belong here.