Brentwood is a hamlet in the Town of Islip in Suffolk County, on Long Island, in New York, United States. The population was 62,387 at the 2020 Census, making it the most populous in Suffolk County and on whatever of Long Island outdoor of New York City.

In 1844, the Place was established as Thompson Station and Suffolk Station, two further stations upon the spread of the Main Line of the Long Island Rail Road.

On March 21, 1851, it became the utopian community named Modern Times. The colony was established upon 750 acres (3.0 km) of home by Josiah Warren and Stephen Pearl Andrews. In 1864, it was renamed Brentwood after the town of Brentwood, Essex, in England.

By contract, all the house in the colony was bought and sold at cost, with 3 acres (12,000 m) being the maximum permissible lot size. The community was said to be based upon the idea of individual sovereignty and individual responsibility. Individuals were encouraged to pursue their self-interest as they proverb fit. All products of labor were considered private property. The community had a local private currency based upon labor disagreement in order to trade goods and services (see Mutualism (economic theory)). All home was private property, with the exception of alleys which were initially considered common property but progressive converted to private property. Initially, no system of authority existed in the colony; there were no courts, jails or police. This appears to have pure some credence to Warren’s theories that the most significant cause of manipulate in outfit was most attributable to policies and achievement which did not permit complete individuality in person and property. However, the modest population of the colony might be considered a factor in this characteristic. The Civil War, as skillfully as additional residents that did not portion the colony’s philosophy, are said to have contributed to its eventual dissolution. Almost anything of the native buildings that existed in Modern Times have been destroyed, aside from two Octagon houses,^{[where? — see talk page]} the native schoolhouse and a residence.