This study examined the influence of thyroid markers (TSH and FT4) on cognition in a sample of rural-dwelling women. Data were analyzed from 81 women who were enrolled in an ongoing study of rural health, Project FRONTIER. Cognition was assessed with the Repeatable Battery for the Assessment of Neuropsychological Status (RBANS). TSH levels were significantly related to the RBANS Attention Index, and FT4 levels were significantly related to the RBANS Language Index. The current study found that TSH and FT4 were differentially related to neurocognitive domains, with TSH being related only to measures of attention and FT4 to measures of language.