This study provides evidence of trends in Korean immigrants' communication patterns. Data were collected in a survey of 400 randomly selected Korean households in the Chicago area and were analyzed for interethnic communication (between immigrants and members of the host society), intraethnic communication (between immigrants and other members of their ethnic community), numbers and types of acquaintances, and the immigrant's individual characteristics. Six major findings are discussed: immigrants maintain a stronger involvement within the ethnic community than in the host society. Participation in the host society increases with time. The number of casual friends (both non-Korean and Korean) that an immigrant has increases during the first nine years, after which association with ethnic friends decreases. Immigrants exhibiting greater interethnic communication are also active in their own ethnic community. Older immigrants do not participate in interethnic communication as much as do younger immigrants. Satisfaction with living in the host society is more closely related to interethnic communication than to intraethnic communication. A sample questionnaire is appended. (RL)