About Bryn Mawr College. Bryn Mawr College in Bryn Mawr, PA reports an overall acceptance rate of 29.4%, an early-round acceptance rate of 37.0%, an SAT middle 50% of 1280–1440, a class size of 380, and a yield of 31.0% based on the most recent Common Data Set filings. Prestigious women's college in the Tri-College Consortium with Haverford and Swarthmore. Known for academic rigor, honor code, and strong STEM programs unusual for a women's college.