District 3 (German: Stadtbezirk 3) is a central city district of Düsseldorf, the state capital of North Rhine-Westphalia, Germany and the city's most populous and one of its most diverse districts.
Stadtbezirk 3 covers an area of 24.20 square kilometres and (as of December 2009) has about 110,000 inhabitants. The northern quarters in close proximity to district 1 - like Biedermeier era Friedrichstadt and Oberbilk - have flowing transitions towards Stadtmitte, Düsseldorf's central business district. Hafen is in an ongoing urban regeneration of the old port, which creates ever new loft-style office buildings, convention venues, night clubs, trendy bars and restaurants. On the southern end of the district, quarters like Volmerswerth and Flehe still manage to preserve their suburban, small-world character.
The district borders with Düsseldorf districts 1 and 4 to the North, districts 2, 8 and 9 to the East and South-east and the river Rhine to the South and West. On the left Rhine side lies the city of Neuss.