Princeton is a city in Mille Lacs and Sherburne counties in the U.S. state of Minnesota, at the confluence of the Rum River and its West branch. The city is 50 miles north of Minneapolis and 30 miles east of St. Cloud, at the intersection of Highways 169 and 95. The population was 4,698 at the 2010 census. A majority of its residents live in Mille Lacs County.
In the winter of 1855 Samuel Ross, Jame W. Gillian, Dorilus Morrison, John S. Prince and Richard Chute platted the town of Princeton. The plat was officially recorded on April 19, 1856.
Princeton's location near the confluence of the Rum River and its West branch was critical to the town's development. In 1847 Daniel Stanchfield led an expedition to explore the Rum River. The group discovered vast white pine forests upstream from Princeton's future site along the Rum River, the West Branch Rum River, and their tributaries. Three sawmills were built in Princeton between 1856 and 1867.