Are Asian-Americans considered an "underrepresented minority" in academia in the US?
There is no universal definition of &quot;underrepresented&quot; and also no universal definition of Asian-American, so it's impossible to answer this question accurately. A very rough answer is that it depends on the discipline (eg computer science vs anthropology) and also on which ethnicities are considered Asian-American.
Your personal experience notwithstanding, it is likely that Asian-Americans are overrepresented in academia overall, simply because Asian-Americans are overrepresented among Americans with advanced degrees. But this isn't a very useful metric from the point of view of diversity and equity.

Edit:
The NSF has a breakdown by race and discipline of US citizens awarded doctorates in 2016:
https://www.nsf.gov/statistics/2018/nsf18304/report/which-fields-attract-students/minorities.cfm
As for faculty, another reason it's going to be hard to find good data on whether Asian-Americans are underrepresented is that schools love to pretend that their faculty is more diverse than it is, so they often have rather creative definitions of &quot;underrepresented.&quot;