Riverdale’s ZIP codes are 10463 and 10471. While 10471 is entirely in Riverdale, 10463 also covers the adjacent neighborhoods of Kingsbridge and Marble Hill.
As of the 2000 census, there were 47,850 people residing in Riverdale. The population density was 19,997 per square mile. The racial makeup of the neighborhood was 78.74% White(71.89% White Non-hispanic), 5.36% Asian, 0.05% Pacific Islander, 7.66% Black, 0.16% Native American, 4.85% from other races, and 3.18% from two or more races. 13.38% of the population were Hispanic of any race. 24.15% of the population was foreign born; of this, 51.76% came from Europe, 22.92% from Latin America, 21.71% from Asia and 3.61% from other parts of the world.
In 1974, a large residential compound and school was established in North Riverdale by the Permanent Mission of the USSR to the United Nations (now the Russian Mission to the UN) to house diplomats and their families. The 20-story building was constructed from the top down, with the upper floors built first.
Riverdale is an upper-middle class neighborhood.