The Indian community is also in the spotlight after Biden picked Senator Kamala Harris, the daughter of an Indian immigrant, as his running mate.
The survey found 72% of registered Indian American voters supported Biden for president compared to 22% for Trump.
The survey, a collaboration between the Carnegie Endowment for International Peace, Johns Hopkins-SAIS, and the University of Pennsylvania, covered 936 Indian Americans.
The Indian community has traditionally supported the Democratic Party, but strong personal ties between Trump and Indian Prime Minister Narendra Modi have raised expectations of a shift.
In an effort to win support from Indian-American voters, Trump hosted a 50,000-person “Howdy Modi” rally in Texas with Modi last year.