ASD manifests in children throughout the ability spectrum, though screening tools may not adequately identify high-ability youth who would benefit from a comprehensive identification evaluation; thus, the impetus for developing The High Functioning ASD Screener (HFAS). Information from content area expert interviews determined the 93-item pilot form administered to high ability youth (ages 5 years, 11 months to 18 years, 2 months) with ASD (n = 15), average ability students (n = 10), and high ability students (n = 23). ANOVAs identified items that differentiated the three groups and/or were most endorsed by the high ability/ASD group, resulting in the 36-item HFAS. Preliminary receiver operating characteristic curves indicate the scale is excellent at classification.