In the years after World War II, the neighborhood was referred to as "Frankfurt-on-the-Hudson" due to the dense population of German Jews who had settled there.
A disproportionately large number of them had immigrated from Frankfurt-am-Main, likely giving rise to the new name.
No other neighborhood in the city was home to so many German Jews, who had created their own central German world in the 1930s.

In 1934, members of the German-Jewish Club of New York started Aufbau, a newsletter for its members that grew into a newspaper.
Its offices were nearby on Broadway.
The newspaper became known as a "prominent intellectual voice and a main forum for Germanic Jewry in the United States", according to the German Embassy in Washington, D.C. The paper featured the work of numerous writers and intellectuals, including Thomas Mann, Albert Einstein, Stefan Zweig, and Hannah Arendt," and was one of the few newspapers that extensively covered the terror of the Holocaust during World War II.

In 1941, it published the Aufbau Almanac, a guide to living in the United States that explained the American political system, education, insurance law, the post office and sports.
After the war, Aufbau helped families that had been scattered by European battles to reconnect by listing survivors' names.
Aufbau's offices eventually moved to the Upper West Side.
The paper nearly went bankrupt in 2006, but was purchased by Jewish Media AG, and exists today as a monthly news magazine.
Its editorial offices are now in Berlin, but it keeps a correspondent in New York City.

When the children of Jewish immigrants to the Hudson Heights area became adults, they tended to leave the neighborhood, and sometimes, the city itself.
By 1960, German Jews accounted for only 16% of the population in the area.
The neighborhood changed in character  in the 1970s as Soviet immigrants moved in.
After the Soviet immigration, families from the Caribbean, especially Puerto Rico and the Dominican Republic, made it their home.
So many Dominicans live in Washington Heights that candidates for the presidency of the Dominican Republic campaign in parades in the neighborhood.
African-Americans began to move there in the 1980s, followed shortly by other groups.
Soon enough, "Frankfurt-on-the-Hudson" no longer described the neighborhood.
In the years after World War II, the neighborhood was referred to as "Frankfurt-on-the-Hudson" due to the dense population of German Jews who had settled there. A disproportionately large number of them had immigrated from Frankfurt-am-Main, likely giving rise to the new name. No other neighborhood in the city was home to so many German Jews, who had created their own central German world in the 1930s.
In 1934, members of the German-Jewish Club of New York started Aufbau, a newsletter for its members that grew into a newspaper. Its offices were nearby on Broadway. The newspaper became known as a "prominent intellectual voice and a main forum for Germanic Jewry in the United States", according to the German Embassy in Washington, D.C. The paper featured the work of numerous writers and intellectuals, including Thomas Mann, Albert Einstein, Stefan Zweig, and Hannah Arendt," and was one of the few newspapers that extensively covered the terror of the Holocaust during World War II.
In 1941, it published the Aufbau Almanac, a guide to living in the United States that explained the American political system, education, insurance law, the post office and sports. After the war, Aufbau helped families that had been scattered by European battles to reconnect by listing survivors' names. Aufbau's offices eventually moved to the Upper West Side. The paper nearly went bankrupt in 2006, but was purchased by Jewish Media AG, and exists today as a monthly news magazine. Its editorial offices are now in Berlin, but it keeps a correspondent in New York City.
When the children of Jewish immigrants to the Hudson Heights area became adults, they tended to leave the neighborhood, and sometimes, the city itself. By 1960, German Jews accounted for only 16% of the population in the area. The neighborhood changed in character  in the 1970s as Soviet immigrants moved in. After the Soviet immigration, families from the Caribbean, especially Puerto Rico and the Dominican Republic, made it their home. So many Dominicans live in Washington Heights that candidates for the presidency of the Dominican Republic campaign in parades in the neighborhood. African-Americans began to move there in the 1980s, followed shortly by other groups. Soon enough, "Frankfurt-on-the-Hudson" no longer described the neighborhood.
Washington Heights, Manhattan