There are many Korean works of art in museums and private collections in the United States, and dozens of Buddhist sculptures are included in them. Most of them were purchased from art dealers like Yamanaka Sadajiro in the early 20th century, and some of them from the collections of US Armed Forces and civilian workers in the military after the end of the Korean War in the mid 20th century. According to my recent survey, many Korean Buddhist statues are housed in the American museums and dozens of Buddhist statues created during the Joseon period (1392-1910) are included in them. Buddhist statues in American collections are of great importance in studying and reconstructing the history of Korean sculpture, especially the history of sculpture in Joseon Korea, because some of them have their documents for the dates and sculptors of the works and some images can be considered to be of the works of sculptors active in the 17th-18th century by formal analysis. Thus, I have examined 9 pieces of statues made from the 15th to the 18th century in American collections such as the Arthur M. Sackler Museum of Art, the Cleveland Museum of Art, the Los Angeles County Museum of Art, the Mary & Jackson Burke Foundation, the Metropolitan Museum of Art, the Samuel P. Harn Museum of Art, the Smart Museum of Art, and the Walters Art Museum. The Buddha statues in the Cleveland Museum of Art and the Arthur M. Sackler Museum are typical works representing two different styles in the early Joseon period. The former reflects a strongly traditional Goryeo style modified by the Tibeto-Chinese style while the latter reflects a strong Tibeto- Chinese style modified by the traditional Goryeo style. According to the results of formal analysis, the standing Bodhisattva statue in the Smart Museum of Art is assumed to have been made by the monk-sculptor Yeongsaek in the early 17th century, the seated Buddha statue in the Mary and Jackson Burke Foundation is assumed to have been produced by the monk-sculptor Ingyun or his followers in the early 17th century, and the seated Buddha statue in the Samuel P. Harn Museum of Art is assumed to have been created in the late 17th century by the monk-sculptor Seungil or his followers. Moreover, the seated Buddha statue in the Los Angeles County Museum of Art had been formerly known to be one of Jeonghaeng`s pieces, but, as a result of analytic comparison to other works by him, turned out not to be. And the seated Buddha statue in the Walters Art Museum is assumed to be the main sacred image of Buddha from a wooden picture (Mokgak-taeng) and has great significance for being the only example of its kind in existence. Buddhist statues from the Three Kingdoms and Unified Silla periods currently in the United States have been introduced and discussed. But, Joseon dynasty Buddhist statues in the American collections are still in need of investigation. Research on Joseon dynasty Buddhist statues in Korea has not been properly introduced to North American academia and museums to the extent that some statues regarded as Chinese or Japanese turned out to be works of the Joseon period, and vice versa. This calls for continuous interest in and investigation of Joseon dynasty Buddhist statues in the future.