How many Russian immigrants came to the us during 1820 and 1900?

Between 1820 and 1900, approximately 400,000 Russian immigrants came to the United States. This wave included various groups, such as Jews fleeing persecution, political dissidents, and peasants seeking better economic opportunities. The largest influx occurred in the late 19th century, particularly due to the upheavals in Russia and the search for religious and political freedom.