About George Mason University. George Mason University in Fairfax, VA reports an overall acceptance rate of 87.5%, an early-round acceptance rate of 89.0%, an SAT middle 50% of 1170–1350, a class size of 4,464, and a yield of 22.0% based on the most recent Common Data Set filings. Virginia's largest public university, located near Washington DC. Extremely diverse (no racial majority); strong computing, policy, and economics programs. Two Nobel laureates in economics.