OBJECTIVE. To create a larger, more representative community comparison sample of the Brief Test of Adult Cognition by Telephone (BTACT) data to facilitate assessment of cognitive function in research studies. SETTING. National U.S. community-based survey. PARTICIPANTS. 6,747 healthy adults aged 23 to 84 years (53% female; mean age = 55 years [SD = 13]). DESIGN. Secondary data analysis of BTACT data collected from the National Survey of Midlife Development in the United States (MIDUS) II and MIDUS Refresher cohorts. MAIN MEASURES. The Brief Test of Adult Cognition by Telephone, a brief (15–20 minute) measure of global cognitive function validated for telephone administration. RESULTS. This paper provides BTACT community comparison sample data based on age, sex, and education from a national sample. Similar to other cognitive measures, BTACT scores decreased with age and increased with education. CONCLUSIONS. The BTACT community comparison sample will facilitate investigation of cognitive functioning in large scale traumatic brain injury research studies, and will support secondary analysis of existing BTACT data gathered through the MIDUS study.