When Korean-American Elizabeth S. Chong moved to Fairfax County in 1993, it was hard to find a taste of home. “There were one or two Korean grocery stores, but they were small,” she said. “Now there are lots — and they’re Walmart-sized.”

That’s a result of the growing concentration of Koreans in Fairfax County, especially in Annandale and Centreville. But the community can have its drawbacks — some say the growing services for Koreans are keeping new immigrants isolated.