The Flatbush Post Office is assigned postal zone (ZIP Code) 11226, but the area understood as included in Flatbush extends into other postal zones.
The Flatbush community has been receiving an influx of immigrants from the Caribbean (West Indies), mostly from Haiti, Trinidad and Tobago, Jamaica, Grenada, Guyana,Barbados, Saint Lucia, Saint Vincent and the Grenadines, Dominica, Antigua and Barbuda,Saint Kitts and Nevis and Belize, since the 1980s, as well as immigrants fromSouth Asia, primarily India, Pakistan and Bangladesh and African countries like Ghana,Zimbabwe, Nigeria, and Kenya. Haitians are the largest ethnic group in Flatbush. Prior to the arrival of these groups, the Flatbush community had already been diverse, with many Italians, African-Americans and Jews. Flatbush is patrolled by the NYPD's 67th and 70th Precincts.