This research report intends to examine the development of two Korean enclaves in Queens and four suburban Korean enclaves in Bergen County by analyzing the growth of the Korean population in each enclave and the changes in its racial composition from 1980 to 2010. It used decennial census data for 1980, 1990, 2000, and 2010, and personal interviews with Korean old timers who lived in those enclaves in the earlier years. Portions of this research report will be included in two of my book projects, one focusing on Korean immigration history in New York and the other focusing on New York Korean immigrants' Korean cultural activities and their effects on New Yorkers. Before they are published as part of the books, I have decided to post this research report on the Korean American Data Bank because it includes important statistical data that shed light on the origins and developments of Korean enclaves in the New York-New Jersey area. The differences in patterns between Korean enclaves in Queens and those in Bergen County have important implications for Korean community empowerment.