The interrelationships between metamemory and metalinguistic development and their association with verbal intelligence and academic achievements were examined for 80 children in first and third grades. At both grade levels, metamemory correlated significantly with meta· linguistic development. The moderate strength of the association was to be expected from a con· trast of the two distinct theoretical constructs that are only indirectly linked within the more general concept of metacognition. For children of both ages, relationships between meta· memory and metalinguistic level and those between a combined index of metacognition and achievement did not remain significant when the effects due to verbal intelligence were par· tialed out. The association between the combined index and a metareading assessment was significant for first·grade children, independent of verbal intelligence.Metacognition refers to self-knowledge about cognitive processes and structures (Flavell, 1979). Two important components of metacognition are metamemory (knowledge about memory processes) and metalinguistic awareness (knowledge about language features and functions). Although each component has its unique theoretical importance in theories of memory (Borkowski, in press) and language (Downing, 1979; Ryan & Ledger, in press), their conceptual and empirical links are tenuous. Yet, each is a specialized form of knowledge that may be important in explaining how children learn to function in a cognitively sophisticated manner in their environments. This article outlines empirical contact points between metamemory and metalinguistic development and their association with general intelligence and achievement. Kurtz, Reid, Borkowski, and Cavanaugh (1982) developed a six-item metamemory battery, assessed its reliability, and demonstrated its validity by showing its relationship with the transfer of an acquired elaborative strategy. Similarly, Ryan and Ledger (1982) showed that metalinguistic knowledge of phonological and syntactic features and of the functions of reading correlate with early reading and sentence-memory performance. In the present study, 80 fIrst-and third· grade children were given metamemory and metalinguistic batteries and the WISC·R Vocabulary subtest, a