The study reports preliminary evidence of the psychometric properties of the Zung Self-Rating Anxiety Scale (SAS) as adapted for individuals with intellectual disabilities (ID) by Lindsay and Michie (Journal of Mental Deficiency Research, 32, 485-490, 1988). The SAS-ID was administered individually and orally to 137 adults with intellectual disabilities and 96 caregivers. An internal consistency reliability coefficient of.80 was obtained. The SAS-ID's convergent validity was demonstrated by significant correlations ranging from.21 to.60 between the SAS-ID and related self-report measures (Fear Survey for Adults with Mental Retardation [FSAMR]); and Psychopathology Instrument for Mentally Retarded Adults [PIMRA] Total scale, Anxiety subscale, and Affective (Depression) subscale. In particular, SAS-ID correlated.40 with the FSAMR, and.44 with the PIMRA Anxiety subscale. Implications of the study are discussed.