Stack Exchange network consists of 182 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
What is the font family and the sizes used in MATH.SE content and headings?
Note that I'm not sure if it is the right place to ask this question. If not, I apologize for that.
From the CSS it appears to be Georgia.