This Statistical Report (Research Report 4) provides an overview of the growth of the Korean population and Korean Americans’ settlement patterns by state and the Consolidated Metropolitan Statistical Area (CMSA), and by county (borough) in the New York-New Jersey CMSA between 1990 and 2010. It is Research Report 4, completed in January 2012. Research Report 4 is a revision of Research Report 2 released in March 2010. Research Report 2 was based on the 1990 and 2000 decennial Censuses and the 2008 American Community Survey. Research Report 4 revised Research Report 2 in January 2012 by replacing data based on the 2008 American Community Survey with data based on the 2010 Census. The Korean population in the U.S. grew to more than 1.7 million in 2010, with more than 220,000 Korean Americans settled in the New York-New Jersey CMSA. While the Korean population in the five boroughs of New York City grew only by 14% between 2000 and 2010, it increased by 48% in suburban counties. Bergen County and Nassau County achieved the highest rates of increase in the Korean population during the period, respectively by 63% and 48%.