Oxford Township, also known as the College Township, is one of thirteen townships in the county and is located in the northwestern corner of Butler County, Ohio, United States, where it meets Preble County, Ohio, and Union County, Indiana. The city of Oxford and Miami University are located here. The U.S. Census Bureau counted 23,661 inhabitants in 2010, down from 24,133 in 2000. Excluding the city of Oxford and the village of College Corner there are 2,099 residents of the unincorporated portion of Oxford Township. It comprises one full survey township in the Congress Lands and is 36.9 square miles in area.