Upper Brookville Home Inspections Completed Full Inspections In Upper Brookville 11/15/2013 321 Mill River Rd Back to Completed Home Inspections The Village of Upper Brookville is a village located within the Town of Oyster Bay inNassau County a suburban county on Long Island, immediately east of New York City,United States. The population was 1,698 at the 2010 census. The village is named for the brook that one time ran along its main road, Wolver Hollow. Albeit the village is physically lower than the surrounding areas, resident Hope Goddard Iselin opposed the name of Lower Brookville, stating "I refuse to live in lower anything. If you must call it something, and I suppose you must, call it Upper Brookville. Subsequently, Upper Brookville was the name that stuck.