To study the concept of national IQ profile, we compared U.S. and Finnish WAIS, WAIS-R, and WAIS III nonverbal and working memory subtest norms. The U.S. standardization samples had consistently higher scores on the Coding and Digit span subtests, while the Finnish samples had higher scores on the Block design subtest. No stable cross-national differences were found on the other nonverbal tests. It is hypothesized that linguistic, educational, and cultural factors underlie national IQ profiles. Some of these factors may be stable, leading to constant cross-national differences. The study of national IQ profiles may contribute to the validity of testing in smaller countries, where the adaptation of foreign, most often U.S., tests rarely includes national standardization. Furthermore, the results of the study implicate that the concept of national IQ is problematic. (Contains 2 tables.)