East Flatbush is a residential neighborhood in the New York City borough of Brooklyn.The area is part of Brooklyn Community Board 17 East Flatbush is patrolled by the NYPD's 67th Precinct.imilar to other eastern Brooklyn neighborhoods, blacks predominate East Flatbush. The area has a population of about 105,000 and is 91.4% Black or African-American and 51% foreign born, the majority of whom are from the Caribbean.