About Trinity College. Trinity College in Hartford, CT reports an overall acceptance rate of 29.0%, an early-round acceptance rate of 45.0%, an SAT middle 50% of 1310–1450, a class size of 547, and a yield of 27.0% based on the most recent Common Data Set filings. Second-oldest college in Connecticut (1823). Known for urban liberal arts education, strong alumni network in finance and government, and distinctive Long Walk Gothic campus.