The North Shore of Nassau County, including Brookville, soon became known as the "Gold Coast." The neighboring hamlets of Westbury, Oyster Bay and Hicksville were a source of gardeners and Hicksville were a source of gardeners and household staff for the Brookville estates. In 1923 there were approximately 22 large estates in the area that was to become the Incorporated Village of Brookville.
In the early 1930s the owners of the estates throughout the North Shore started to incorporate into villages to protect the acreage zoning. The Village of Brookville was incorporated in 1931 and first election for Village officers was held at that time.

Cereal Heiress. Socialite Marjorie Merriweather Post, the cereal heiress, who was one of the wealthiest women in the world, sold here grand Brookville estate in 1951 for $200,000 to Long Island University, which established the C.W. Post Campus on the property's 178 acres.
From the day the campus was dedicated to the end of the 1960s, Mrs. Post would occasionally attend college functions, football games and student social. Here, Marjorie peers through the magnificent leaded windows of the Great Hall, here former living room (1968).

Luxembourg visited Brookville. During the summer of 1940, the royal family of Luxembourg visited Brookville. Below, in this family picture, their father, Prince3 Felix, photographed the family. They sought refuge in Brookville after their country was invaded by Nazi forces.