Caumsett

Lloyd Neck was granted to the Lloyd family in the seventeenth century, and the Henry Lloyd House, built in the early 1700s by a son of the first lord of the manor, still stands at the old estate entrance. The National Register nomination notes that Jupiter Hammon, whom it calls America's first Black poet, was born on the manor in 1711 and lived there enslaved.

In 1921 Marshall Field III, a grandson of the Chicago merchant Marshall Field, and his wife, Evelyn, bought about 2,000 acres of the neck; the New York State parks page gives 1,750 acres. Field named the property Caumsett and meant it to be a self-supporting country seat with a home, a hunting preserve, a cattle farm, and a dairy. He hired John Russell Pope, who had trained at Columbia University, the American Academy in Rome, and the Ecole des Beaux-Arts. The Caumsett Foundation dates the start of the building program to 1922, and the nomination says the estate was completed in 1925. Pope designed the main house and nearly every other building, and he also shaped the site plan and views. The Cultural Landscape Foundation credits Percival Gallagher of the Olmsted Brothers with planting work from 1925, Marian Cruger Coffin with the grounds of the Winter Cottage, and Alfred Hopkins with the farm buildings.

The main house is two stories high and thirteen bays long, of rose-colored brick with limestone trim and slate hipped roofs. Its stair hall has original murals, and several second-floor rooms contain antique woodwork taken from older buildings. Two west wings were removed in 1950. Pope also designed the Winter Cottage, finished in 1923, the polo stables, and a large farm complex for Field's Guernsey cattle. The estate made its own electricity and water, ran its own fire apparatus and dairy, and employed a staff of 85.

Field died in 1956 and left Caumsett to his third wife, Ruth Pruyn Phipps Field, and the Field Foundation. On February 2, 1961, they sold it to the State of New York, with Robert Moses acting for the Long Island State Park Commission. The estate was listed on the National Register of Historic Places in 1979. In January 2026 the state added 180 acres from the former Seminary of the Immaculate Conception, bringing the park to 1,680 acres.

Today the park is open from sunrise to sunset every day of the year. Visitors can walk, bike, ride trailered-in horses, fish, and cross-country ski across fields, woods, salt marsh, and shoreline, and the Lloyd Harbor Historical Society occupies the Henry Lloyd Manor. The main house can be seen from the grounds, but no regular public tour schedule for its interior was found.