Oak Grove Cemetery was established in May 1845 and formally named in May 1871. When it was officially designated as the township cemetery, remains from the area's old burying ground, begun at the corner of Mill and Washington streets in 1832, were moved there. Those buried here include Elizur Ruggles, Milford's first white settler, and veterans of the War of 1812 and the Civil War. The site includes an early potter's field near the Huron River. Its cemetery vault, built to thwart grave robbers and to store remains during hard winters, dates to 1885. In 1980 the vault was restored and a new fieldstone entrance was built. The original cemetery covered 12.76 acres and later expanded to 15.6 acres.