About St. Olaf College. St. Olaf College in Northfield, MN reports an overall acceptance rate of 48.0%, an early-round acceptance rate of 64.0%, an SAT middle 50% of 1310–1460, a class size of 822, and a yield of 27.0% based on the most recent Common Data Set filings. Lutheran-affiliated college renowned for its music program (the St. Olaf Choir is world-famous). Strong STEM and study-abroad participation (one of the highest rates in the country).