Fennpfuhl is a locality situated within the borough of Lichtenberg in Berlin, Germany. It covers a total area of 2.12 km² (0.82 sq mi) and serves as one of the city's residential districts.
The area has a population of 30,932 as of 2008. Fennpfuhl is notable for its high population density, reaching 14,591 residents per km², which makes it the second most densely populated locality in Berlin, following Friedenau.