In regions with large numbers of Asian Americans, communities have developed that are heavily or predominantly Asian. Schools in these areas may offer instruction in languages such as Mandarin. These communities are often given unofficial names to reflect their populations, such as Chinatown, Little Manila, Little India, Little Pakistans, Koreatown, Little Saigons, and Cambodia Town.
Reference 1: Total population and % of Asian Americans.
Reference 2: Honolulu, HI MSA, San Francisco Bay Area, Greater Los Angeles Area, Sacramento/Yolo, CA CMSA, San Diego, CA MSA, Seattle-Tacoma metropolitan area, New York metropolitan area, Portland, Anchorage, Alaska, Baltimore-Washington (AA demographics), Greater Houston and Clark County, Nevada, NV/AZ MSA.
Source: http://en.wikipedia.org/wiki/Demographics_of_Asian_Americans#Distribution
Reference 2: Honolulu, HI MSA, San Francisco Bay Area, Greater Los Angeles Area, Sacramento/Yolo, CA CMSA, San Diego, CA MSA, Seattle-Tacoma metropolitan area, New York metropolitan area, Portland, Anchorage, Alaska, Baltimore-Washington (AA demographics), Greater Houston and Clark County, Nevada, NV/AZ MSA.
Source: http://en.wikipedia.org/wiki/Demographics_of_Asian_Americans#Distribution