More detailed educational attainment (2018):
Bachelor's degree 21.9%
Master's degree 9.6%
Professional degree 1.5%
Doctoral degree 2%*
* Somewhat higher than in the social explorer link based on 4-year 2015-2019 ACS (4.5 million vs. 3.1 million).
Surprised PhD is higher than professional which I'm guessing is mainly MBA/JD. MBA cash cow programs are common.
Maybe Ed.Ds are part of the higher doctoral number. Seems pretty common for education administrators to have them now, often paid for by the company or school like the MBA factory programs.