Marble Hill is a complicated place. By land mass, it sits in the Bronx. But by legislation, it’s actually part of Manhattan. City Hall news provides a history lesson about why the anomaly exists.
In 1895, city engineers wanted to connect the Hudson and East rivers to aid shipping efficacy, so they dug a canal beneath Marble Hill.In 1912 when Bronx County was created, and Marble Hill was part of it, reports City Hall.
But in 1984, a Marble Hill resident called in for jury duty in Manhattan tried to get out of it by claiming she was a Bronx County resident. The case never went anywhere, but the judge made the decision that Marble Hill was part of the Bronx. Afterward, then-assemblyman John Brian Murtagh sponsored a resolution making Marble Hill part of Manhattan, City Hall writes.
So, Marble Hill is part of Manhattan and New York County, but is physically part of the Bronx. It has a Bronx area code, zip code and services like sanitation, but elects its officials from Manhattan.